Lower Back Pain 18 Weeks

So I just got enough strength (around 14 weeks) to start to go for short walks and now (16+ weeks) I have been working out a little bit more.

The past few days I’ve had AWFUL back pains right above my butt and can barely bend over at times.

It does come and go. I’ve tried to put ice/heat on it, but I feel like I’m an old ass lady! :(

Help!