How To Stop Brownish Vaginal Spotting After Taking Micronor 2?

Hi, I started taking Micronor 2 weeks ago because I am going on vacation in May (24 days). However, on Thursday I began having brownish spotting and how an almost seeming full-fledged period. I know its not my period because I had it the week prior. I've heard women complaining of 2 week periods and breakthrough bleeding of this pill, when will this stop and should I get off the pill? I cannot take the combination pill.