Spotting instead of period?

okay so with my last pack of pills, i skipped my placebo week so i wouldn't have a period & immediately started a new pack. ever since starting the new pack, i haven't missed a single pill. i'm almost finished with week 2 & about to start week 3. i woke up this morning to notice i had light spotting in my underwear & a bit brown/red discharge when i wiped. i know spotting is normal on the pill, but it doesn't make sense why i would spot if i haven't missed a pill? :/ i usually only ever spot if i accidentally forgot a pill. could it be because i skipped my entire placebo week with my last pack? any thoughts? thanks!