Missed period on birth control

I’ve been on Drovelis (combo pill) for exactly a year now and have always had a withdrawal bleed during my sugar pills. This time tho I’ve just had brown and very faint pink discharge instead of a full on flow as I normally do.

Has anyone else gone through this and was fine?

The pharmacist told me it’s not normal, I took a test and it came back neg but I think I might test again with morning pee tomorrow.