Hi angelique!
I so know how you feel! I'm almost 23 weeks but have had lower back pain for the last couple of months. My OB said it was because your body produces a hormone that stretches out the ligaments. I find housework the most painful, sweeping and washing up especially. I haven't really tried anything, I just rest until it stops hurting and that seems to do the trick. I do sleep with a pillow between my knees though and for some reason this takes the pressure off.