Ok…I was dreaming then for the first time I did a nose RC but it didn’t work I plugged my nose and couldn’t breathe through my fingers so the dream went on.Has this ever happened to any of you?
If that didnt work for you I would try something else for a RC. But hay maybe some of the experts here can answer this question better than I can. Since I can anly give you a tip that might help.
you have to really expect the RC to work:
if you think that you will not be able to breathe, ie. you think you are awake, then you will not be able to breathe.
this means that every time you do an RC, beleive that it will work. Doing more than one RC never hurt either 
Sometimes, RC’s work, sometimes they don’t. You should try different RC’s and make a statistic of your RC’s to know which works the best for you.
And sometimes they don’t work, but make you lucid nevertheless. 
Thanks
Try doing it faster without thinking. Ive never had that RC to fail me like that, but I have done it before, and was abale to breath through my fingers, and still didnt realize I was dreaming.