VERY LATE PERIOD

Hi, I am 16 and I have had my period for just over a year now. I have a boyfriend but I’m not sexually active but my period is over 3 months late bearing in mind I am a virgin so I cannot be pregnant. I don’t really know what to do! Can anyone help please?

I have had very little spotting and a lot of discharge and I get period symptoms but no blood😫😫