Period or implantation

Hi!

10 DPO I started bleeding , it was very light and Intermittent (first photo) it carried over into the next day off and on and then that night I got one thin mucusy strand of dark blood with no clots. After I wiped that away nothing else was there.

Yesterday it went to the last photo a few times when I wiped and today it's basically gone .

My periods are usually very heavy and clotty as soon as I start

I haven't had to use a pad or Tampon with this at all .

I'm crampy , irritable , tired , boobs are sore

And 2 days out from original "expected period"

With a negative pregnancy test this morning .

3 1/2 days of bleeding

Any ideas ?