I also have a hard time eating fresh fruits and veggies, but sometimes I can't resist so will eat them knowing I will pay the consequences. I don't have a lot of self control...
My down fall is fresh tomatoes...I absolutely love them! Fresh out of the garden with a little salt and pepper! Yummm!! One of the things that I have learned is to peel the skin off everything first. The skin is the hardest part for your body to digest. Next time, try peeling the skin off, or suck as much of the meat and juice out and spitting out the skin. Maybe you will be able to tolerate them that way.
Also, sometimes the thing you tolerate one day, you will not be able to tolerate the next.