Concerned

So this post will be TMI. I just got my period for the month, or atleast I think. I normally have extremely heavy periods, like there’s a lot of blood. However, I got up at 5am and I could tell my period had started, but it was extremely light. I’ve went all day with NO blood on my pad but when I wipe after using the restroom, there is a small amount of brown. What the heck is happening?

I’m honestly interested in figuring this out and would like you lovely ladies’ opinions!