pink discharge, spotting? implantation bleeding?

Am I pregnant?
Got random pink discharge today around 2pm. I've been really stressed this past week and this is stressing me out even more could I be pregnant? My period is supposed to happen next week. 
Last time I had sex was Valentine's Day. Used a condom as always. I've only ever had one condom scare a couple cycles ago and I took plan B and my period came and went like it was supposed to. 
WHAT DO I DO