Spotting 24 days after d&c?

So I had a d&c on Sept 19th due to baby stopped growing and hb stopped beating :( was suppose to be 10 weeks baby stoped at 8 weeks 4 days. I bled for a week spotted on and off till day 11.. All my opks have been negative since I started testing at day 11.. my hcg has returned to zero ( had a hcg count on thur) we have had unprotected sex since day 11 also. I have been mucusey here and there and have had sharp side pain on Friday (usually happens before or during ovulation) yesterday I had some pink mucous when I wiped then had some old brown blood only had to change tampon once bleeding lasted a hr or so and now completely stopped. I Google it it says could be start of a period or could be implation bleeding. Glow says some women spot when they ovulate but opks are still neg! Usual when I ovulate my face breaks out bad and that started Friday to! Has anyone have any input or has this happend to any other women I'm so confussed! Help!