Pain in my pelvic Area

I've been experiencing pain in my pelvic area the past days. Today is really bad. I spent an hour on the toilet, I felt like I had to poop. I keep thinking I'm maybe constipated since this Sunday I'll be 9 months pregnant. When I stand I feel the pressure more. I think it's my baby boy head putting pressure ? Any advice ladies ? 😞
I feel better when I'm laying in bed. It calms down.