Yesterday after walking about a mile in total to walk to school to collect my daughter and back, when I got home I was very hot and began to shake uncontrollably. I was not breathless and didnt seem to have a rapid heart beat. I do have anxiety but this was not like any panic attack I have had, it felt very physical. I had a drink of water and a cereal bar and sat for about ten minutes and it went away. I have been on citalopram 20mg daily for over 6 months now, due to feeling very anxious. My dad, sister, auntie and grandma all have slight tremors, as I have since I was a teenager, but never like this. I am 43. A couple of weeks ago, I felt vibrations in my head when I was waking up. Do you think these things are related? I have just walked further this morning, and felt ok, a little tired afterwards. I have had diareah almost every morning for over 6 months now, although I am gaining weight.