On bc im not due for my period for another 3 weeks. when i wiped today there was a very light brownish discharge. is this normal?

Breakthrough bleedin: This is breakthrough bleeding, when the lining becomes unstable and you bleed.it can happen on occasion on low-dose birth-control pills. It does not affect the contraceptive aspect of the pill. Do not stop taking the pill. If it keeps happening, you may need to change to a different pill.

No worry: This can happen on OC for many reasons ,make sure you are taking OC daily.