Hi Sarah,
I can very much relate to your post. But I've never known of a modern situation in which God commanded someone to marry a person they felt uncomfortable marrying (I'm not saying it can't happen, I just haven't encountered it yet.)
I was in a church for a very long time that believed in prophecy, but the head pastor always warned us to be careful of any personal "prophecies" that had to do with marriage, birth (pregnancies and future children), and death. It's not that they didn't believe such things could come from the Lord, it's just that they hadn't really seen any accurate "prophecies" about them.
A while back, we had a regular poster who had a dream in which they saw a person whom they felt God was telling them to marry, and eventually, they did meet this person from the dream, and married them. But, several years later, the marriage ended in a heart-breaking divorce. I am certainly not saying that God in anyway caused or wanted the divorce. But I'm just saying... even if God did will for them to be together, it's not a shield from the consequences of sin and human faults.
Many years ago, I believed "God" was telling me I would have a certain number of children, and even what to name them. It seemed viable because God was always telling people about having kids and what to name them in the Bible, right? I even went to other Christians for verification and the 3 I went to all felt it was from God as well (one of them being a pastor.)
And here I sit, in my forties with the desire to have children long gone, unmarried, and no children. I have no idea what happened... Was I just hearing from demons, and the people I looked up to saw how happy I was that they too became caught up in a lie?
I'm sorry for this long post, but I would like to share one more story before I wrap this up. A very long time ago, I had a dream in which I was trapped in a house, and two men were about to capture and kill me. I started to sink to the floor and scream, and as I did, water started pouring in through the windows, causing my panic levels to go through the roof. I knew that either these men were going to kill me, or the water was going to cause me to drown.
But as the water rose to my knees... An amazing thing happened--my feet grew together into a fish's tail, and I became a mermaid--swimming out the window to safety. The water (or terrible situation in my real life) that I thought was going to drown me actually drowned the men who wanted to kill me and allowed me a means of escape. And not long afterwards, a little boy, about 2 years old with very white-blond hair, came up and swam next to me.
Years later, I met that little boy in real life, and was in a position of taking care of him for the next 3 years. But a relationship with his father was impossible (alcohol and the myriad of issues that come with it), and it was heartbreaking to have to leave that whole situation behind.
To this day, I don't know if that dream was from God. I do know that it meant something, but are demons so bored that they would actually put together something that complex just for someone as behind-the-scenes as me?
I understand the dilemma you're having very well. If we think "God" is wanting us to do something, we start to panic because we don't know if we're doing enough to obey or get ourselves in line with God's will, and we certainly don't want to disobey.
One thing I CAN tell you, without a doubt, is that just because something comes from God, it does NOT mean that it will work out (such as a marriage that stays together forever,) or that it will be a happy situation.
God told Mary that she would be the mother of His Messiah, and years later, it says a sword pierced her heart as she saw her beloved son hanging from a cross.
God told Zechariah and Elizabeth that they would have a son who would pave the way for Jesus; I often wonder how they felt when they heard that their beloved son had been beheaded.
Jesus made Peter a foundational leader of His church, but was eventually martyred for his faith.
I am not saying any of this to sound negative or because I don't believe in the power of God (I most certainly do), but I'm saying this to hopefully spare someone out there from the excitement of "hearing from God", only to see things turn out quite a bit differently than they had pictured it to be.
P.S. If I could, may I also mention that it's very important to be aware of people who might be trying to spiritually manipulate you and others. For instance... a "prophet" who believes they are a prophet will want to make sure all their "prophecies" come true, thereby pressuring the people they have so generously "prophesied" over to do whatever it is they were told "by God"--through them, of course!
After all, they can only keep up their reputations as a prophet if the things they say actually come true, and if you aren't as agreeable with their words and they'd like you to be, I've found that the most common tactic is to accuse you of being rebellious against God.
What they fail to notice is, the real rebellion... is not doing what they want you to do, and how can they keep up their guise of being a "Person of God" if no one will listen to anything they have to say?
May God bless you with wisdom and discernment, and keep you safe from wolves in sheep's clothing.