pain relief and weight?

Danielle • Engaged to my best friend and first time mother to my precious boy x
So.. my tummy is super tight where my little man is obviously trying to grow... it's very uncomfortable and often keeps me awake. Is there a way I can relieve the stretching? 
Also... I'm currently coming up to 24 weeks, I've only put on 3lb from my original weight but I lost a bit at the beginning so if I include that I've put on about 10... is this within the normal range?