So I’ve TTC and been off birth control since March. The last period I had was May 20-25. I have not had a period since but because I have lots of opk strips I test every once in a while. I had 2 days in a row of positive opk on the 11th and 12th of this month. Can I still have a chance of getting pregnant with no period since May?

Also I have had irregular periods in the past. And I am also NOT pregnant for sure. Did a blood test and many urine tests.