Birth control shot and sex

I got the shot last week on Tuesday morning they told me that I should not have unprotected sex until next Tuesday (7 days later)

Last Friday night (day 3 after the shot) I had sex and the condom broke! He came in me

I went to planned parenthood the next morning to get a plan-B pill (Saturday morning)

They were packed and they told me they were not taking walk ins anymore that day

They told me to return Sunday morning

I wasn’t able to go back today Sunday morning so I will have to go tomorrow (day 3 after sex)

I guess I’m just asking for your guys opinions of how likely it is for me to get pregnant 😞