Stomach Problems

I am a diabetic and I am on quite a few medicines, but have been so for awhile, I was recently on victoza but stopped taking it due to the nausea that followed when taking it. After I stopped, it got better...until recently I usually throw up atleast once a day, generally at lunch time at work...I have tried cutting down portions, different foods...but nothing has helped. I do feel better once I vomit though. I also have heartburn for which I am taking OTC medicines. I still feel the symptoms sometimes though. Im not sure what to do.