Sun heat symptoms and conditions

Hi, ive been on Yasmin now for 1 month and 3 days. A few days after starting it I got a rash on my chest and upper arms which i thought was sparked by the sun/heat. It went away and then a week later my skin slowly started to get itchier and itchier until I was covered in a rash from my ankles to my neck. I looked like I had a weird disease. Even the doctors were impressed, but no one could help. We suspected the pill as it was the only thing that was new to my system, but then it disappeared and we put it down to being caused by stress. Ive just started the next month (like I say 3 days into it) and once again I find myself scratching an feeling basically itchy and very very tired (not that it is unusual the tiredness I have to say, it just seems a little more than normal). I am now pretty sure it is the pill, but am nervous just to stop taking it. I just don't want to go through all that ive just been through with the previous rash, it was HORRENDOUS! Has anyone else had such a severe rash reaction? They were red, itcy spots with a watery kind of top to them........