Hello, last time I started was on November 23. Me and my partner had twice a week unprotected sex I believe it was when it was my fertility window but took plan B when we did it. Took test before a day it started and tested negative and took one another today and say negative again. It started with the color brown with pink then later went to pink red to red to brown like in the pictures. Can anybody help figure out if this is implantation bleeding or ???

(SORRY FOR THE PICTURES) TMI