No period...

I took plan b about 2 1/2 weeks ago after a mishap with my bc pills. The same day I took it, I had very light spotting that lasted a day. I have not bled at all. I’ve had brown discharge for about 4 days now and some very slight bleeding but not enough for a pad.

I’m supposed to get my period in 4 days, as I took the plan b 2 days before I was supposed to get my period. Since I’m on bc pills, I was actually trying to purposely skip my period when I had this whole mishap, so after I took plan b I continued with my new pack. I’m honestly scared that I haven’t bled yet but I’m not sure if this brown discharge is normal?? I took the plan b 12 hours after sex too. Any advice helps please!!!