stomach pain

I'm 15 weeks pregnant, this has been a rough pregnancy dealing with morning sickness and losing 22 pounds because of it. But ever since Tuesday I've been getting this almost like Stabbing pain going from my belly button straight up to where at times I was doubled over it hurt so bad, has anyone else had this problem or something similar to it? I go to the dr tomorrow, so I plan on talking to her or her NP about it.