I think that's great that you're seeing a GI pyschologist. She seems very perceptive, which is what you need. I don't think anything one your list is a trigger food and it seems to me that you prepared everything safely. So it sounds like your body just isn't used to these foods, which makes sense considering how restrictive your diet may have been in the past. The only foods I completely stay away from are those listed on Heather's trigger foods list (the STOP! AVOID OR EAT WITH CAUTION ONE!) - these are common/general triggers for everyone.
So, I would say to continue on doing what you're doing. I had discomfort and some other problems when I started eating beans and fruit (mostly with the fruit). It just takes a while for those enzymes to kick in, start working, and producing more. "If you don't use it, you lose it" explains pretty well what happens with those enzymes.
Good luck, Beth. I agree with Kate and everyone else who said they're so proud of you. Keep up the good work and overcoming those food fears.