Period is late

My period are usually pretty regular. Either come a day or two early or a date later than when it’s predicted, if it doesn’t come on that day. My period is now 5 days late. I haven’t had sex since my last period, and what I did with people this past month is unlikely to end in pregnancy, but I’m still worrying.

I’ve been on antibiotics and probiotics for the past 10 days. Could this delay my period?

My discharge resembles how it is during ovulation, but I should’ve ovulated a couple weeks ago.

Thoughts?