Within the hour of taking it my heart started to beat very fast a...

Within the hour of taking it my heart started to beat very fast and breathing became difficult. Then I had difficulty speaking or forming words and had trouble walking. I grew increasingly tired and decided to lay down and had difficulty opening my eyes. I still couldn't talk so I decided to sleep it off. The next morning I still had trouble breathing and still do after a week or so of taking it. The doctors I have spoken to don't seem to think it's anything serious and don't care to document these reactions in my chart. The breathing problem occurs about twice a day and lasts about 1 and 1/2 hours. I was taking this medication for anxiety and depression.