Second month of brown discharge instead of period. haven't missed a pill. coul i be pregnant?

Maybe normal: After some months or years not unusual for pill takers to have very lite cycles. As long that it occurs when on last or dummy pills on which to bleed on and doesn't last over 7-8 days and occurs only when due per pill pack then we should be fine. As always you may check with your Gyn to test for other causes .i .e infection , pregnancy ,polyps,etc..sometimes changing pill may give you a cycle.