Missed my Period

Reem

My period is late by 6 days, I’m virgin and I’m anxious about it

It’s the first time to happen

I’m 23 and all my past periods were regular every 28-29 days lasts for 5 days

I currently have finals and my dad passed away 3 weeks ago, I guess I’m stressed but idk if it’s the reason,

can that have a relation with my missed period or it could be something pathological?