Quoting nita84:" when i was on nuva ring i had issues like that...my period would be consistent for awhile then all of the sudden it would be really late. could be whats going on with you. good luck"
I've never had a problem with it being late. I was on it before we started TTC our LO and I never had a problem with it. I wouldn't be super upset if I was pregnant. I just never planned to have 2 kids this close together.