Help.

I had tubal reversal surgery 3 weeks and 2 days ago. I got my period on time after surgery. I’ve been taking ovulation tests and it’s still saying I’m not ovulating. I’m not sure if I did already and didn’t notice. I’m due for my next period in 8-10 days. I’m not sure what’s going on. If I should wait to take a test until like a day before or day after my period. They say ovulation occurs 14 days after your last period and it’s been 18 days since my last period. I’m so confused. 😞