19+5 limbs going numb?

Breanne

hi all! I noticed today that my right arm from shoulder to finger tips have been going numb at random times! one was while I was in bed, laying on my left side and my whole right arm went numb and another was while I was sitting on my couch! I wouldn't think that baby could be on a nerve since I was on my left side, but who knows! anyone have any ideas of what could be causing it or what I can do to help it?