Does Skipping Sugar Pills Cause Spotting And Itching In Vagina?

hi i didn't take my sugar pills a few weeks ago, hoping that i wouldn't get my period for a vacation i was going on. i didn't work and i believe i am experiencing spoitting right now however it is not the normal bright red blood. also i am having some vaginal itching along the outside of the opening. is this a side effect of skipping pills or is there something else that could be going on