Help!! NEED ADVISE

Ka

Hiii :) I’m 23 and I was on the depo for 3 months.. it wore off on October 2017 and never went back to get another round because ive been trying to concieve. Anyways I tested positive for ovulation on 1-17-2018. Is it possible to get pregnant? I also used preseed! Or will it take a while since I was on the depo? I haven’t had normal periods it’s usually a brown color. My last period ( brownish color) was 1-4-2018! BD my fertile window tested + For OV On 1-17-2018 :) thanks gals❤️