I swear my pelvis floor felt like it hit something rubbed against it hard and then popped about 4…

I swear my pelvis floor felt like it hit something rubbed against it hard and then popped about 4 times back to back. Ugh only 21 weeks and I don't understand why baby is so low I can already feel something and this pain from baby is so unbearable mostly. I hate to complain about a miracle like this but if I had a choice of going 40 weeks versus a 9 week pregnancy like a cat I swear i would choose 9 weeks. Hopefully my doctor says its normal and to give me advice on what to do. If y'all have advice for the pain and pressure please PLEASE let me know.