Cramping before needing to go (tmi)

I'm almost 14 weeks and every time I have to have a bowel movement I get cramps. I had this early in first trimester and it went away but now it's back. The cramps are so bad that I can't think or do anything until after I go to the bathroom to relieve myself. I eat mostly fruit and pastas and proteins (eggs, peanut butter, chicken)