i have a question idk if any of you could help out! :(

i had my baby july 2016 (6 months pp) and i got on depo September 2016. i only got one shot. i was supposed to go back dec.9th 2016 for another shot but i never did. i bled through out november and october but not december. i got my period january 2nd 2017. it ended like the 9th.. and i had unprotected sex (my husband did cum inside of me) 9th and 10th and following days of that week. well on january 17th i started getting cramping for like a whole day and that went away. i had a lot of white milky discharge. but yesterday January 19th i had clear discharge with brown and light pink/red blood. and today i continue to have it. its only when i wipe. it doesnt come out in my urine. but since i already had my period at the beginning of the month .... what are my chances of getting that positive or negative??