Very lite light brown discharge instead of period

I am on the pill ministrin (excuse the spelling)

I always take the pill around the same time every night (9:00-10:30 range)

I am sexually active but we always use condoms

Last month my period was extremely light, with a mix of brown discharge and a tiny bit of red blood.

My periods seem to be getting lighter and lighter lately

I did have a lot of stress this month.

This month i am just getting brown discharge and some gooey bits.

Is this normal? I am not having any pregnancy symptoms, i am not pregnant right?

I have been on this pill for about 2 years. But ive been on birth control for about 4.