I think plan b caused my period to skip??

I’m 15 days late, but I have clear discharge which would normally indicate ovulation and it’s started on day 14 of my cycle which is CONSISTENTLY when I get that discharge. I took plan b so ya I know my cycle is messed up for a couple months but before plan b my cycle was very consistent. Always got my period on day 29 of my cycle and always get that clear discharge indicating my ovulation on day 14.

I haven’t gotten my period yet so I took a pregnancy test and it’s negative. I also booked a doctors appointment but it’s not for another week cus that’s the earliest I could get it

Anyone got any ideas what’s going on with me????