Need advice on symptoms at 35 weeks

With my first I had an emergency c-section at 34 weeks. This second pregnancy I have made it to over 35 weeks and recently my lower back has been hurting (dull and achey) and I’ve been having period-like cramps. My hips were feeling like they were separating (ouch) and my feet bones were hurting. I was kinda miserable the last 2 days.

But today I woke up feeling better and I feel smaller! Like I don’t have this giant tight belly anymore. I don’t know why but I almost feel normal. I can breathe a bit better and no heartburn today. Any ideas? I’ve googled it of course lol.. but looking for real women responses. Thank you