When I use my laptop my fingers go numb?!

So this has been going on for about 2 or 3 days. It usually happens when i use the mouse pad, my middle finger, ring finger, pinky, the side of my and about half of my wrist goes numb, then when i rest it, it kind of locks in place for a couple of seconds before I can move it. I'm only 15 too, so is this normal, or do i need to get it checked out. Oh yeah, it's only in my right hand, not my left, even though i use that hand too with the mousepad.