I think I’m pregnant 😶

I’m 15 years old and just over a month ago I had a pregnancy scare with my boyfriend where the condom completely broke, we went straight to the pharmacy and got the plan b pill, I was quite unwell for the next few days and then my period came 15 days early and it was extremely light. I have had sex quite a few times since and we have used condoms every single time and they have worked properly but my period is a week late now and I’m extremely worried as it’s usually on time.

Is this due to the plan b pill or could I be pregnant??

*please no hate about my age I know I’m young but in all it’s my decision about what I do with my life.