Implantation bleeding??

Sydney

Ladies, I need help. I’m freaking out. I’m only 19, I’ve been on the pill for almost 3 years. I’ve taken it perfectly. My partner never finishes inside of me. I’ve taken a test and it came back negative. My period is due in about 10 days, but I just went to the bathroom and wiped and I had pinkish discharge. I’m worried sick because I do not want kids and I’m super safe when it comes to sex. I was thinking since I’ve been so stressed maybe I’m bleeding some. I really need help here so comments are appreciated.