Chances of Pregnancy?

I am on birth control (have been for over a year 1/2 since my last baby). We had a pregnancy scare/chemical. I tested positive Feb 10th. I had 4 pills left in my pack & I stopped taking them (due to positive preg test & doc recommended). Tests faded to negative and I had my period Feb 13-17th.

I always start a new pack on Sunday’s, so I will start a new pack tonight. So it’s been 11 days off birth control. App says ovulation is in 7 days. We had unprotected sex the past 3 days. What are my chances of pregnancy? Will starting my pills tonight cover me? Anyone get pregnant in between packs?