brake help please

Failing MC's are like that, sometimes sink sometimes hold. If you don't flush thru new brake fluid every 3 years where you live you will likely get internal rust which causes leaks and tears seals, unless you use DOT 5 (silicone).

I think rotors will often drag after sitting for years, due to surface rust, but sounds like that cleared up quickly.

The brake pedal comes up to push open the lamp switch, so the dropping pedal didn't hit it.