Hello! I’m here with a situation

1- I missed the first two pills of my combo pills 4 days ago

2- I doubled up the third day AND doubled up today (fourth day)

3- I just had unprotected sex with my bf

4- He did NOT eyaculate inside me, he did it a few minutes after, outside of my vagina

Note: he had to masturbate for those few minutes to cum

Should I be scared of pregnancy? I think the chances are very low