I'm not really sure what is happening or if I should be worried. Ive been having bad pelvic pain for a few weeks now but this afternoon I began having some awful back pain. I thought it was because I was laying around all day so I swayed on my birthing ball and that didn't help like it usually does. So I went and had a bath and when I was done I layed down. But now I'm getting sick and I'm very nauseous. Is this preterm labor? Should I call my midwife? Or am I just sick?