Has anyone else experienced this pain down low in the stomach?

For two days now I have had a very sore spot in my lower stomach, off to the right. From my hip bone, it is about three inches in and two inches down. The pain kind of radiates out from there. Different ways that I move, or when I change position too quickly (like stand up fast), it sharpens into a stabbing pain.

I also have had a headache for the entire two days I have had this hip pain.

I am 17 weeks pregnant, and I am not spotting at all and have no other symptoms. I had my appendix out years ago, so it can't be that. This happened to anyone else? Is it related to the pregnancy or something totally else?