If you had the second abortion, then the bleeding could be from that. You didn't mention when you had the second procedure done, but I believe you can bleed for up to 3-4 weeks afterward. I bled lightly for only a few days after my abortion, but then about 4 weeks later, I had one day of brown spotting. If you are still concerned after a few days, call your doctor.
This may be a little TMI, but my sister gets what you described as "dirt looking" discharge some months when she is ovulating. ( except she described hers as brown boogies lol) It freaked her out the first time, but the doctor assured her it was normal. You may be ovulating.