I took a pregnancy test about three weeks ago andf the test came back positive. A couplue of days later, I began spot bleeding off and on for about 2 weeks now. It stopped for about 4 days then continued again and is still persisting. I have had mild back pains and abdominal cramps. My bleeding has been light to only spotting. The spotting is usually red, pinkish or gray. I haven't seen any clots or anything like that.My pregnancy symptoms aren't as bad. I no longer really have morning sickness and my breast are no longer very tender. I have had some nausea and I have vomited about 4 times out of the 2 weeks of spot bleeding. Am I having a miscarriage or is there something else going on? How long can a miscarriage take?