Excess tissue symptoms and conditions

Ive been on the nuvaring for about four months and for three of those months everything was fine. my doctor told me that i could leave it in for 3 weeks and have a period for a week or three weeks and change to a new ring. well being that most women hate periods, i decided not to have one four four months. But now i am having this weird brown discharge(no smell) and i have had reoccurring yeast infections (white discharge, itching, burning). this skin around my vagina was raw for a week or so. gross i know. can anybody tell me whats up with this. i have been overly emotional because i thought something was wrong with me. is it?