Well, no longer pregnant

I got a call Monday with my blood tests and they said it was below 2. I know anything lower than 5 is not pregnant. I'm glad though, that maybe I can concentrate on a healthy pregnancy. The thing is, which I'm confused about is, I keep spotting brown. I would of thought I would of stopped by now. Its been a month since the shots and my levels are down, so I don't know why this is happening. Its not alot, but mostly every time I go to the bathroom its there. Its making my whole period tracking off, which I knew would be confusing the first month anyways. We arnt trying, but not preventing. I have been so busy, that trying wouldn't of worked anyways. I just hope this goes away and I'm going to give it another week, and if I'm still having it, then I'm going to call the doctor.