Pink Discharge 🤔

My period is late by 3 days and just today I had pink discharge or spotting, I thought I was going to get my period but white discharge continued to show. I took plan B on Nov. 27, it’s my second time and the first time i had my period 5 days after that, even though I had it a few days before I took the pill. Man I’m sexually active and my boyfriend pulls out. I already have one child 😓 why am I so careless. I haven’t taken a test yet, should I wait or take one today?