A bit confused is it me

Niamh
Sorry I know most people don't agree with my age using this app but I'm confused,
I'm 14 and Iv had my period since I was 12-ish and I got into my cycle and it was all going well but my last few periods have been late and out of sync and stuff I have never had sec had a boyfriend or anything like that. PLEASE HELP IM REALLY CONFUSED