Just hit 24 weeks and starting to have issues staying asleep...I fall asleep fine, but then one of various discomforts wakes me.

Stomach feels like I'm smooshing the LO, right side makes my thigh go numb, left side makes my ribs sore (costochondritis), and most anything in between makes something fall asleep (mostly arms). Propping with pillows seems to twist my back and cause other soreness. My back is actually the most comfortable but every expert and book and my own providers insist this is bound to asphyxiate the baby.

Help! What have all you women done? Share your secrets!
I'm starting to really think every 2 hour feedings don't sound so bad - at least by then you can sleep in between them!