I’m scared I might be pregnant

I had sex with my boyfriend last Friday. We used a condom and it broke. Before it broke I looked at the condom and the tip of it had white stuff like on the inside and I don’t know if it’s from his precum or from before when I gave him head?

Anyway before he came I was a little dry but I let him keep going and all of a sudden it just got slightly more wet so he hadn’t came yet, I think whatever was inside before he came was in me. He then pulls out and realizes the condom broke. He starts freaking out because he doesn’t know if he came in me at all or if he pulled out then came.

We both got worried and rushed to the pharmacy and we got birth control pills to take as plan b because I live in a country where the morning after pill isn’t available. I took 4 birth control pills every 12 hours for 2/3 days. I was supposed to get my period 2 days after this happened (which was last Friday) but now I’m 3 days late.

I spoke to the pharmacist and he said there’s a low chance of pregnancy but I’m still super worried. I know i wasn’t ovulating when this happened. I’ve also been having my normal period symptoms but nothings happening.

Please let me know if anything similar has happened because I really need help. I’m 17 and there’s no way I can be pregnant.