Ok , I have sort of a funny question. Do any preggers out there wake up in the middle of the night to......?

YES! I am 28 weeks along and for the last 5 weeks I have been feeling and doing this, the twinges you feel is just a muscle in the abs pulling, its ok though, and the switching over is normal, its just hard to get comfy. However I have found sleeping with a body pillow, putting it between your legs and then under your belly. It heps too because you dont have this belly hanging there and it gives your legs some extra support.