Hi Smurf
I'm afraid you can only review the rent once every 24 months so, yes, you would have to wait until November 2017 to review the rent again and you would have to give 90 days notice of any increase.
If the area is determined to be a rent pressure zone in the meantime, any such increase will be subject to the 4% cap. I'm afraid you have been badly burnt by these new rules.
The RTB has published a good summary of the new rules:-
[broken link removed]
You really should (re)register the tenancy with the RTB - it's an offence not to register and you can't deduct any interest payments for income tax purposes if the tenancy is not registered.