Sorry to hear that you have not had any periods yet.
There could be many factors that causing you not to have your period as normal this month.
Your period can be irregular for a lot of different reasons (besides pregnancy which you can't be because of being a virgin) such as stress, exercising, gaining or losing weight, being sick, taking certain medications, or having a hormone imbalance. It’s a good idea to keep track of your cycles and talk to your health provider about your periods.
It is normal to have irregular periods for the first few years of menstruating — and sometimes even longer. But the only way to know if everything's OK is to visit your doctor or nurse practitioner . The length of a menstrual cycle can vary from girl to girl, but on average they're usually between 21 and 35 days.
Periods can be late as well as early due to reasons out with our own control.
If you have any concerns about things then you best go and get a GP appointment either in person ( more preferably) or a phonecall and discuss your concerns. Possibility your period will come still okay.
A NHS registered midwife.