Implantation bleeding? Period?

Not sure if this is the right place to post this but about 2 weeks ago, I started spotting brown.. then it changed to pink spotting about a week ago. I googled everything and thought it was implantation bleeding so I took a pregnancy test and it was negative. Moving on to this week, I am STILL off and on spotting/ wiping pink and sometimes even red.. I took another pregnancy test (a week after the first) and it was negative as well. I’m 10 days late... and this has been going on for 2 weeks.. shouldn’t something be showing up by now? I normally have super heavy periods so this is just odd to me that it may just be a period extremely stretched out? Any info would be much appreciated.