Opk experiences first month off pill?

[CKJ]

I've used opks b4 but the month after my cycle returned following a mc. This is the first time after coming straight off the pill. I'm cd15, n last time I was off bc didn't Ov til day 17/18 so there's still hope lol but can anyone share their experiences when opk-ing immediately post pill? Did u ovulate? N if so on what day? Just curious really!! I have cheapie opks but hadn't planned on using them all up in a month BUT I kinda don't want to stop just so I know if/when I do Ov this month even if I don't catch the egg iykwim! Still after cd20 I guess I might just give up on the sticks n bd every other day as we've done til now...figured if there's a pattern of ladies o'ing a bit later post pill it's worth sticking out

Thank u!!