Skipped period week HELP PLEASE

So I have been taking bc pills for 4 months now and I went on vacation but that week I was supposed to get my period so I continued taking my birth control. Ever since that week I have been discharging brown ever day (almost like my body is trying to get my period since I never gave it a chance) and it has been 3 weeks now.  I am now on my week that I am supposed to get my period (stopped taking my pills on Saturday) and still haven't gotten my regular period. Should I be worried? Should I see my GYN? I know there is no possible way I am pregnant since I took bc continuously for two months (and I've always had regular periods before) so will my body just regulate by it's self?