Pain? Pressure? Help!

So, ever since I began the third trimester, my hip joints ache like no other, like I overstretched my hips. Not to mention, walking is so painful and switching positions when laying or sitting. I get a sharp pain right in my pelvis if I make the slightest move. It’s impossible to move my bottom half in any way without a sharp shooting pain to my pelvic area.

I’m just curious what the heck this pain is? It literally sends me into agony. Send help lol. I’m curious.