BFP followed by bleeding.....

Hi guys! This last Saturday I got my BFP. I started lightly spotting Sunday night. It first started as red spotting, and then turned to brown/light brown/red brown color. It was on and off light to heavy spotting. Had HCG drawn two days ago is it was a low of 17. Getting labs drawn now again. Woke up today with heavier red bleeding and clotting. It sucks. I know what the answer is already. Did my greiving and crying, and now I just feel so irritable. My Clear Blue said 1-2 weeks, so I was really early. I took another HCG preg test this morning, and it's still positive. Anyone have this experience or similar one? How long did you bleed for, and were your cramps horrible? I'm afraid it's going to get worse, but it's already been 4 days of bleeding/spotting. :(