Sleeping on side hurts. Anyone?

Jessica • Mom of 2 boys, 1 girl🧒🏼👦🏼👦🏼26 years young. Engaged💝💍
So I haven't been able to sleep on my back for weeks now cuz I literally can't breathe. But now laying on my sides hurts so bad and just feels like there is a lot of weight pushing down on the side I'm laying on. I've tried using pillows but nothing helps. It's almost getting too hard to breathe on my sides.