NEED SOME ANSWERS!! PLEASE HELP!!!

I currently have a 6 month old. I was breast feeding, and I got my period back when he was a month old. When I got my period back it was extremely heavy for 2 months. The last couple periods have been back to normal. My period for June was a day late starting at June 29th, and is currently still going. It has been extremely light, very pink blood. I am going on almost 2 weeks of bleeding, and I have no idea what is happening. I have never had this happen to me before. My periods have always lasted 5 days at the most. I have no cramping at all or nausea. I do have back aches and the occasional headache. My husband and I have had unprotected sex, but he does pull out every time(obviously I know it's not 100% effective.) Could I be pregnant again? Everything I look up tells me it's a miscarriage. I tried to buy a test today but my card was declined, and I can't currently afford anymore doctor bills. Does ANYONE have any helpfull advice or experience the same thing??