Is this normal?

Just a few days ago I had yeast infection treatment (cream inserted into my vagina for 3 nights) And prior to that I had unprotected sex while on birth control and he did finish inside me and it’s been over a week since and I’ve had pink, to red and to now brown discharge that is a bit stringy looking at times, I’m not sure if this is signs of implantation or just my vagina recovering from sex and the yeast infection? When I visited the nurse asking about the pink discharge a week ago she said it isn’t anything to worry about however I’m now a bit worried and paranoid after googling about my discharge and it’s appearance