Quick question about BCP

Holly
I had my nexplanon removed over a month ago. I was given the bcp. Decided we wanted another baby. Only took bcp for a week. I had my normal period on the 18th last month. Had a small one day bleed two days after stopping the bcp
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My question is: we have been having sex, unprotected, I've been having a brown discharge for over a week. Could I be pregnant? Or is that part of withdrawal from the pill. I had my nexplanon removed because it was wearing off. I was getting regular periods with it in, hence the removal. My period is due tomorrow. I always just got my period, no brown discharge. I'm just curious as to what's going on. I would love to be pregnant