My Name Is Emmanuella. I Had Pelvic Inflamation November 2016.

My name is Emmanuella. I had pelvic inflamation November 2016. I missed my period for October and November 2016. I was given antibiotics November 2016. On the 21-24 December I notice dark brown drops of blood not heavy for the 4 day. I reported to my doctor and she gave me Clocit tablet to take from the 7th day which was from 27-31 December 2016. I had sex on the 1st of January 2017. Now I started having heavy bleeding on the 7th January 2017 still bleeding even on 9th which is today with a sharp pain at my lower left side of my abdomin. Please am scared and I don't know what might be wrong