Your pain, is it only in your lower back? And if so is it more to one side than the other?
I am 26 weeks and having the same thing. When I walk I feel sharp pains and get what feels like bad period cramps. They are so bad they wake me up. I am going to ask my Dr what's going on when i go Monday. I know baby is fine because I feel him move.
I am 26 wk 5 days. I get cramping a lot when i am on my feet a lot but this is nuts. I did just get off work so i am trying to relax but it's almost worse when i am laying down.
I went through this for a week or so when I hit about week 23ish. Howe far along are you? You might want to go to the hospital just to be on the safe side.