Hi moms I am 36 weeks now and I can barely walk properly, my pubic bon…

Hi moms I am 36 weeks now and I can barely walk properly, my pubic bone and my back are killing me. If I walk for too long it feels like my tummy is getting hard and heavy like it's going down. I don't know what is happening as it's my first child. My next doctor's appointment is on the 21st