Belly Pain

Morgan
I'm a FTM and I'm 28 weeks. Lately, when I wake up, I've been having really bad belly
pains. Usually if I'm laying on my side and roll over it hurts. Sometimes to the point of taking my breath away. I know I'm not sleeping on my back because my husband will wake me up and tell me to roll over. The pain is usually at the top of my belly under my chest? Baby still moves a lot, so it's not that I don't feel him. I know I'm at the prime growing time but is there a reason behind this? I would love to know!