Old skin 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?

Had the Mirena fitted April 30th 2007, and its all just dawned on me why my skin has turned awful, I've put on weight, I have no sex drive, and my moods switch from good to bad in seconds. However, am worried Im going to speak to my doctors, and they are just going to say 'Give it a couple more months' I don't want to wait! I want my old skin, weight, sex drive and moods back!
And what is the best alternative contraception? Don't they all have this hormone?