How much vaginal pressure is normal? Walking hurts 😢

Alexa • Micah Tyler born 08/31/17 💙
I'm 31 weeks and just had an ultrasound yesterday, they said my son is super low and it took over an hour to get his head measurements because of that. I've had increased pelvic and hip pain and pressure for a week or so now but he measured on track at 3.7 lbs. I'm not having any cramps or contractions and my cervical length was 41mm so I know I'm not near labor but damn it feels like he's clawing me in my vagina when I try to walk. And I've had lightning crotch alot the past few days. It's so painful to walk. Is there anything I could do for it and should I call my doctor? I'm afraid it's completely normal and I'll just be suffering for the next few weeks lol.