What???

I am 17 but this is really weird to me. I've had sex once this cycle, using a condom and I am on the pill. So I know I am definitely not pregnant. But a few days before the week of period pills I've been having brownish-red, thick discharge, but no "official" period blood. I looked online (the best way to scare yourself, in other words,) and it said it usually happens towards the end of my period because my uterus is cleaning out (which I knew already,) but it says towards the beginning can be an early stage of pregnancy.

?!?!?!?

This has me terrified. The only thing I can think of that may change the circumstances is that I had gotten a vibrator. Could using it cause me to spot and get this brownish discharge? I also read that with some women stimulation to the vagina like a vibrator can make you spot but idk thoughts???? I'm terrified as I shouldn't be pregnant hELP