When did I get pregnant? Help please!

My period started on March 14 lasted for 7 days as usual. Ever since I had a miscarriage back in august my cycle length have been about 23-26. According to glow I started my fertile window the 21-26. I had unprotected sex on the 23 with pullout method then right after he stuck it in me again for round 2. On the 4th of April I had sex again it this time he didn’t pull out because I believed we were in my safe zone as my period was due the 8th. Is there a chance I could’ve gotten pregnant on the 4th of April? I had a positive pregnancy test on the 12th so that made it 4 days late on my period which made me realize I needed to test. It was a super light line but def positive! I just really wanna know if I could’ve gotten pregnant on the 4th and tested positive a week after If that is even possible with my period being due so close.