I am 32 and never suffered from anxiety. Then out of the blue I suffered a massive panic attack I thought I was dying. After a couple of week I had another. I felt I couldn't breathe all the time. I went to my gp who said it was acid reflux and gave me medication for it. Since then everytime I feel the acid reflux I start to get anxiety. The doctor put me on sertraline 50mg 1 a day. I am on day 3 and feel awful bad sickness crying alot and just feeling myself is this normal?