NuvaRing and roomate

I was on the pill, Mircette, for about five months. I decided to stop taking it and try nuvaring because I had a roommate who loved it. I'm on birth control because I had mood swings with pms that noone would stay around me. I had my period off of birth control two weeks ago. Started Sunday the 8th. Usually they were three days at the most. This one went all the way to the 13th. I put my first nuvaring in Saturday night around 12am on the 14th. For some reason I couldn't get situated. It burned and I could feel it and just wasn't comfortable. I dealt with it til about Monday morning when I took it out and decided it wasn't right for me. I've been kinda dizzy, cry a lot, I'm shaky and tired. My boyfriend and I haven't had sex in about seven weeks and I took a pregnancy test the day before I started my actual period two weeks ago and it was negative. But I woke up today, the 23rd and I had lite bleeding and backaches. I know its normal coming off of birth control, but seeing as how I didn't have it in very long is this still normal? Has anyone else experienced this? I called my gyno and she said it was probably just breathrough bleeding but I'm worried.