holy back pain! is this normal?

Lori
I did not restart my BCP this week.  We will soon be TTC. I have the most horrific lower back pain.  And maybe some cramping in my stomach?  I can't pinpoint the cramps because the back pain is so bad.  And I never had cramps or anything bad before my periods when I was younger, so I really don't know what that feels like, make sense?
I don't remember this happening 11 years ago when I stopped BCP to TTC the first time.
I'm 40, if that makes a difference