implantation blood or period blood?

Hello I currently stopped  my birth control pill and after 5 days of stopping my birth control I now have spotting that brownish pinkish it's not  in my underwear only on the TP me and my fiancé have been trying for a second baby . Is this  implantation bleeding or period bleeding? I have to going to pregnancy test and both of them say negative I didn't  have this with my first baby. Please try to help