Hands falling asleep a lot in the third trimester?!

Gabriela • First time mom. 23. Due 06.26.17
Iv been noticing that every night I'll wake up suddenly and both my hands or just one has fallen asleep. I didn't have this before I was pregnant. I don't know if it's a normal symptom of pregnancy or not. My rings don't fit me anymore and I have gained quite a significant amount of weight. Not sure if this could be a reason.
Did anyone else get this during pregnancy?
Thanks