I think your fiancee is exactly right. He's obviously a good guy, otherwise you wouldn't be marrying him -- so trust him! :-)
LRon, thank you he's so so good. I've just been trying to convince myself that if something was up my blood work would be off and I'd be in pain. He's always reminding me that if something was growing in there I'd feel pain. I'm really trying!
You wrote "Like if I'm really busy and not focusing on my stomach insides it doesn't bother me." So focus your energies and attention on the world and people around you, not on sensations within you. Good luck!
I've been there, my friend.
I had that same feeling in my upper abdomen, where it feels like it needs to gurgle but won't. It is in fact IBS, but I thought I had a stomach ulcer! Eventually I stopped obsessing over it and took some TUMS it went away within a few days.