Severe Back Pain 29w

So

I’m exactly 29w with baby #2 and probably since 26-27w my lower back has been hurting so bad.. mostly by the end of the day.

But the last week or so, the middle of my back has been hurting SO BAD- it’s mainly at night when I lay down. I cannot get comfortable the pain is that bad.

Does anyone have any tips for easing the pain? It’s kind of like a sharp pain on my spine.. I do use a pregnancy pillow.. PLEASE HELP!