Sleeping comfortably !

Does anyone have any tips on getting into a comfortable potion & being able to stay in it for the night? I tend to find myself waking up 3-5 times a night because my stomachs soo uncomfortable, I’m 29 weeks & trying my hardest to get some sleep but honestly can’t at this point please let me know if you experienced any uncomfortableness during the night & know how to solve it !