Delayed period?

[QWE96]

I was wondering whether anyone has any potential insight into this. I had my last period on the 14th of July. I started Yasmin on that date and only took it a week as it made me feel awful.

My period is now 4 days late. 2x negative pregnancy tests. Is there a chance the week's worth of the pill delayed ovulation and that is the reason my period is late?

TIA

Hi everyone

I am 22, never been on BC and I am not pregnant. I have a pretty regular 25 day cycle my shortest and longest ever being 22 and 28 days. I have been taking folic acid for a few weeks and I’m currently on day 31 of my current cycle with no period. I’m wondering if anyone else has experienced folic acid delaying their period and if so how long after not taking it does it return?

Feel free to pm also