So about periods...

Semonna

Anyway, me and my boyfriend are long distance, the last time we got down to business with the chance of slipping, was like the first week in October when he came over for a month and that was the only possibility of getting pregs, the he left around the 19th of Oct and I started my period a few days before, pretty sure 17th, and I usually have mine every 5 weeks quite regularly for the past 2 years and I havent had my period since, and on the app I'm 7 days late, would there be anything wrong with me? Or is this normal? Ahhh need assurance 😢 I haven't bought something to test yet but hoping I shouldnt have to.... thoughts?