Felling much heavier the last couple of days?

Im 29 weeks, will be 30 on thursday and the last couple of days it has felt like my belly is a lot heavier. I can hardly get out of bed these days as I have some much weight in my belly Dragging me down. It has only been the last few days, I even look a lot bigger and it feels like that has happened over night too. Could the baby be in a certain position that weighs down my belly more, and also make me look bigger. Any answers would be appreciated, thanks!