Implantation bleeding?

I’ve been looking up symptoms of implantation bleeding and I need others opinions since google doesn’t do justice.. yesterday I experienced a very light pink discharge/ blood. Today it’s more of a light brown. I’m not due to start my period for another week. 6 days ago I had sex and just now started bleeding.. I’ve taken my birth control correctly and this hasn’t ever happened before being on the pill for about 5 yrs now. If I’m not wrong this could be a sign of early pregnancy?!