HELP - i’m 15 and i haven’t gotten my period is that normal like hello what’s going on why is nothing happe...

i’m 15 and i haven’t gotten my period is that normal like hello what’s going on why is nothing happening and it’s not like it runs in my family my mum and nan said they both started around 13 and i’m starting to freak out that i’m never gonna start and ik i’m only 15 but like everyone like everyone ik has it