About a week ago I received a positive pregnancy test. Then a few days later, I began spotting and having cramps. The bleeding is slow and not very much, but it's enough to wear a pad. There has also been tissue passing through, but this is nothing like a normal period. (I've always had irregular periods.) I've heard that both of those can happen during a pregnancy and also a miscarriage. My doctor can't see me until a week or two from now. I know I won't know for sure until I see a medical doctor, I'd just like some insight on whether I should worry or not. And also, I'd like to know when a pregnancy test would show a negative after a miscarriage? Thank you!