What is it? TMI pics⚠⚠

I sometimes have this brownish discharge. It can't be my period because it happens mid-to-late cycle.

For example, I've had this for two days (light brown colour)

and this other one for two days too (much darker)

I don't think it is spotting. I've only had sex on my cycle days 1 and 6 (on my period and a day after it ended) and am currently on the 23rd. My cycles usually last 35-40 days.