Carb intolerance

Does anyone have any experience with this condition? I am 4 yrs post ryn. I had my appendix removed the first of this year and found out that I also had an ulcer. Both of those conditions were fixed and I still have physical symptoms of extreme stomach cramping and gas and dry heaves or throwing up as well as general fatigue. So yesterday a 3rd scope showed the ulcer is gone and now the doc (whom I love and trust) says I may be lactose intolerant and especially carb intolerant to where the carbs create dumping syndrome into my intestines. I'd like to find a good diet to go on. There is so much info out there and I am filtering through it all.
If anyone can help out with tips... its much appreciated :) Tks

 I'm not having any problems with carbs or skim milk/cheese.  I am 4 weeks post-op.

J.