I.G.
I had a problem with certain toothpastes too. It was bothering my gums so much that I wanted to pull my teeth out. My dentist told me I was sensitive to certain toothpaste; most likely the ones with whitening agents in them. He recommended Colgate Total (the basic one) and Aquafresh (again the basic one). He told me to stay away from Crest. Hope this helps you. If that doesn't work, I would ask my doctor (M.D.)