Sex during my fertile window. HELP

so I had sex with this guy last night & 5 days ago.

I didn’t realise today was my ovulation day!!! I went to get the morning after pill first thing this morning but I’m scared. He did cum in me (dumbass) but now I’m scared my plan b pill isn’t gonna work.

What are the odds of me getting pregnant? Has anyone else been through this? Please help I’m stressingggggg