Late period- Negative Test

Shelby

So I typically get my period around the 25th or 26th each month. As of now I have not had my period and am showing no signs of it anytime soon.

I did not track my ovulation this month and didn’t really try super hard to get pregnant. I tested both Thursday the 27th (1 day late) and Friday the 28th (2 days late) - both were negative.

Any experience with this? When should I test again?