Skipping my pill

So last week was spring break and I was supposed to take my placebo pills, but I didn’t want my period so I continued to take my birth control pills. On Wednesday last week (which is when I normally get my period) I had a little bit of reddish discharge but then it stopped by the end of the night. This week I decided would be my period (I’m taking the placebos) but it isn’t what my normal period is. It’s just brownish discharge and is very very light. I’m also nauseous and have abdominal pain. Is this a side effect of mixing my pills or should I be worried? Does this count as my period?