I don't know, I just know the cramps are pretty painful. I called and they are doing an ultrasound at 10 to make sure everything's ok (with the disclaimer that they may not be able to see anything since I'm only 5 weeks). I feel horrible because I don't want to seem like someone who freaks out over every little thing, and my hubby won't be there.
I do have a cold sore popping up which I'm not thrilled about. It really sucks but I'll take it.
Sophie I have heard that spotting and cramping is normal in early pregnancy, but if you are concerned I highly recommend calling your doctor to make sure. I just called and they are doing a scan.