I went to the restroom today and when I wiped it was light pinkish and I noticed dark brownish red…

I went to the restroom today and when I wiped it was light pinkish and I noticed dark brownish red on my liner. I didn’t get a cycle last month unexpectedly but the blood test I received was negative for pregnancy and ultrasound showed collapsing cyst of corpus luteum at the time. I did finish my cycle last week on the 6th and according to my tracker app, I am due to ovulate this weekend. So what could this be?

*TMI Pictures posted in comment*