Pinkish period late TMI

My came 9 days late with negative testes earlier. It usually lasts 6 days now is day 3 or even 2 and a half and its almost gone.

Its either pink or a bit reddish, the lightest ive ever got.

This is how it looks. And there was no old blood or clots at all during this 2.5 days. I usually have 1st day heavy and much darker.

Anyone has the idea? Shoud i check for something? Please,im worried.