Severe back pain 😖😖😖

So my back has been achey for weeks. Didn't think anything of it but last night I started to have the sharpest pain in my lower right back, right above my butt. Got up this morning and it was gender but ok....until I started leaving for work. Couldn't stand, walk, lay down....nothing helped. Call drs and said it could be a pinched nerve or my hip was displaced. 😕😳 Any suggestions on how to keep this from happening? I'll be 28 weeks on saturday.