Stressing too much

I just got the eve app and I have put down the needed information to predict when my next period is due but eve had predicted the 22nd of Jan and it's now the 26th and I still haven't got my period.

I'm not in a relationship of any sort. And I'm a virgin but i can't help being anxious

The thing is before I wouldn't monitor when my period is due. So I'm not sure how far apart my periods dates are...

Please help!!!😫😫