Pelvis feels like it’s falling apart

I’m 34 weeks pregnant, my next doctors appointment is Thursday. But I was just curious if anybody’s had this before. After walking for a while (like grocery shopping) I get this heavy feeling in my pelvis and start having sharp pains. Sometimes it’s so bad I don’t know if I’m gonna make it to the car. Just turning over in bed is so painful. I’ve woken up twice and started crying because I was turning in my sleep and the pain was so bad it woke me up. Getting up from sitting down is so painful sometimes it takes me a minute. It literally feels like my pelvis is shredding. I also get this weird popping feeling down there when walking. I’ve tried hot baths, Tylenol, heating pads, sleeping with pillows between my legs, nothings helping. I just didn’t know if this is normal or not this is my first baby.

Also, I’ll start cramping on and off. The cramps are similar to period cramps.