Miscarriage-still testing faint positive

Leigha • Married August 22, 2015
Miscarried at 8weeks. Baby measured 6/5days. I inserted misoprostol Friday Oct 30th. Passed everything big in 4.5 hours. Bled for 2 weeks. Still have brown discharge with random red(blood) here and there. 
I have been testing with hpt's and STILL very faintly positive. Also testing with opk's, got positive a week after miscarriage but that may have been from the hcg.
I have NOT gotten a positive opk since. We had sex Nov 12 th, 13th, 15th and 18th.
Wonder if I can or did ovulate already. I have no idea when to expect my period. 
We want to get pregnant right away 
Insight anyone?