Idk about the gas part but I'm 27 weeks and still get constipated but lately I've been drinking a glass a day of apple juice and it has helped so much. I would try drinking more water and have a glass of real apple juice a day (doesn't matter what flavor just pure juice) hope it helps!
Thanks I'll get some pure Apple juice tomorrow
Fiber rich foods like bread and apples help. Also drink at least 10 8oz cups of water a day!(: