I had that "gut feeling" so strong in the beginning of my last relationship and all throughout.
My friends say, "Well, Lacey, you had thought about ending it countless times before it got so serious, why are you surprised that all that happened?" Boy, I tell you, I HATE hearing that, even though I know it's true.
I ignored those "gut feeling" or "spirit guides" that had always been so good to me, and I payed the price BIG TIME. In fact, I'm still trying to get myself back on track.
So, if you got the feeling, just try and meditate, get in touch with the universe. Maybe the reasons for the feelings will show...But, always listen to that gut!