11 day late period & 3 negative tests

[niamhwright]

Please please can someone shed some light on what may be happening/ whether it is worth going to the docs for.
I'm 20 years old and currently 11 days late for my period- which usually comes like clockwork. It'd be 9 weeks today that I last had sex (19th Aug) & my last period (as far as I remember) was just like normal. As I never miss a period/am late I've taken 4 home pregnancy tests (1 clearblue, 3 cheap supermarket ones) and all the results have been negative.
I've been on the POP for over a year but i'm not amazing at taking it so i do miss days.
Please can someone help and explain what may be happening!! Thank you

Missing pills can affect your bleed. It's frustrating, but there's nothing you can do. If tests are still negative at this point, pregnancy is unlikely.

Ps- you aren't a clock and we are all susceptible to odd things happening.

I was on a pop for ten years and very rarely had a period. It could be that perhaps?