Uy, totoo yan, 20 weeks is when sleep gets super uncomfortable na talaga! Try sleeping on your left side with a pillow between your knees, at honestly, a pregnancy pillow is a game-changer (a few of us invested in one at ito talaga game-changer). Ako personally hirap din noong ganitong stage kaya I started doing light stretching before bed, at limiting water after dinner para hindi ka laging gising for bathroom runs, it helped a lot sa amin. Wag masyadong mag-alala, but if the discomfort is really bad or you're having other symptoms, better check with your OB just to be safe!