Missed period, negative tests

I’m looking for some information with regards to a missed period and negative pregnancy tests.

Period was due on Friday, didn’t show up all weekend. I’ve taken 6 pregnancy tests, different times of the day, but mostly with my FMU. I’ve tried the FRRR and CB. Nothing. No idea what is going on.

Periods are usually regular, never had any issues before. We did BD lots during fertile days.

I’m currently on cycle day 31 and I always get my period on cycle day 26 or 27.

I have booked a doctors appointment for next weekend, but would like to know if this has happen to anyone else and what the outcome was.

Thanks 🙏🏻