Have been totally confused during the last few months of feeling ill. Have had underactive Thyroid for approx. 12 years and suddenly told my Doctor I had to increase my 100mcg dose to 125mcg last year. A short time after the dose increase, I started to put on weight. I then had chest pains and was taken into hospital with suspected heart attack!! My heard was found to be sound so they couldn't say what this was. On reflection and after reading other postings, I now know that this was a reaction from my Thyroid. Feeling ill, but still taking increased dose I went back to my Doc and after a couple of weeks had phone call telling me to stop taking the increased 25mcg dose and stick with 100mcg.after losing over 1 stone. Had further blood test - after ten days phoned for result - told it was clear?!! After 5 more das received phone call telling me to get prescription from surgery as I needed to decrease my 100mcg. Totally confused what should I do? This sums up so many other postings that the General Pratitioner does not know enough by the Thyroid and its problems.