Ovulation test question

Nicole 👧👼👧👦🤰

So this is my first month using ovulation tests, I got a positive on cd 17. I’m 2 days before my period and got negative pregnancy tests, so I’m pretty sure I’m out. So my question is, if I don’t get my period but I’m not pregnant when do I start testing for ovulation again? After my period would have ended? I was on birth control for 3 years so I’m sure it will take a little while for my cycle to become regular again. Thanks!