Did I ovulate ?

I had my implant removed in January then no periods until this month, im ttc and i have been using opk every day no definite positive :/ although i did have egg white cervical mucus on the day the app said i would most likely ovulate, i have had sex at least every other day since my period, now on cycle day 19 cervical mucus has stopped, is it possible i ovulated and the opk didnt pick it up ?