Has anyone had trouble taking GNC Ultra Mega Liquid vitamin? It says Gluten Free. I had to go to the Dr. last week thinking I was having a heart attack. It is clearly an allergic reaction. I just don't know to what? It seems like my body is allergic to everything. I am so sensitive to medication and vitamins. I tried the liquid because I have spent so much money on really good vitamins that hurt my stomach. The Dr. said my EKG was fine and sent me on my way. Benadryl is the only thing calming my feeling in my chest. It is a scary feeling. Jodie