Paleo diet is hard! Good luck to you, and I hope it makes you feel better. I think it would be hard to eat like that forever. The diet I try to follow, is similar to the Paleo diet, but you can have grains and few more foods.
I have had success with the Virgin Diet (By JJ Virgin). Eliminate 7 foods that can cause inflammation: soy, wheat, dairy, peanuts, sugar, corn, eggs. You follow this 100% for 3 weeks, then introduce the foods one at a time, to see what bothers your system.
I suffer from ulcers, due to the fact that I have a small stomach (gastric bypass). My doctor prescribed a PPI, which inhibits the acid in the stomach. My ulcers are cured. I think my intolerance to wheat and sugar is worse because of my surgery. I learned a lot on this diet, but still lack discipline to eat right, so I get sick a lot.
While on the Virgin Diet, I lost 16 pounds in 2 weeks (mostly bloating), my stomach went flat, I had even energy, less mood swings. I felt great! I introduced wheat, and noticed my face and hands were puffy, my knuckles were stiff. Sugar gives me a bad stomachache and bloating, so I look like I am 3 months pregnant. It's funny, you don't realize how sick you are, until you feel better. (I'm starting again on Monday, I really am! haha)
I wish you success, and I hope you find what works for you!