any one experiencing severe itching to the point they cannot slee...

any one experiencing severe itching to the point they cannot sleep? At first the doctor thought I had a staff infection-i work in sports medicine so their easier to pick up. When I was back two months later after taking my antibiotics he didn't know what was causing it. My husband hasn't caught it either and it's supposed to be highly contagious. I've spent many nights trying to figure out this itching-so bad I can't not scratch. The only thing I can think of is the IUD. Also have gained weight and can't loose it although I have ate and exercised tons better than ever before!