I had sex 6 days before my ovulation day! And I’m scared because it was my first time and we were using protection, but there was a moment we didn’t

Two doctors told me that is impossible cause I was too far(6days) from my ovulation day

But I’m scared cause I don’t know if it is possible

I don’t know how long are my period lengths

Sometimes 28 other times 23 days

So! Please someone who can help me! I’m really scared