TMI WARNING!!! Photos attached

Yesterday at 7dpo I started with brown spotting only when I wiped. This was on and off for around 2 hours. Last night it looked like it was starting to turn pink with a tint of red so was sure it was AF although I’m not due on for another 9 days. Put a tampon in and now today (8dpo) it looks like this, brown spotting? It’s stopped now anyway. Took a hcg strip and was negative but maybe still too early?

Could this be implantation bleeding??