Okay am i worrying over nothing

This is long but stick with me:

Fingered on Feb 10. May have been some precum on his hand but im unsure if he wiped it off. No sex at all. Period was due the 19th of February and I got this:

Moving to today blood still going. Some times in large strand i took a test today with first response and got a negative. My period seems lighter but I’m not sure if its all just stress

The photo above is from yesterday:

And the photos below is today

Am i over worrying? Or is this implantation bleeding..