I took a plan B on day 9 of my cycle, and my average cycle length is 30 days. My period is now 3 days late according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a>, and I am on cycle day 34. I usually have irregular periods. But last month my cycle was 28 days.

The only other time my period has been late like this was when I had double jaw surgery and lost a lot of weight last year. I ended up getting my period on day 39 that time.

I’m kinda worried this time because I did have unprotected sex on day 8 and 9 which was why I took the plan B on day 9.

I was thinking maybe my period could also be late because I have been drinking a lot of electrolyte water, which I have read can cause late periods because of sodium imbalances? Has anyone heard of this?

Thanks to anyone who takes time to read this and reply.