In my master bathroom we are not getting any water up to our tube and ot this moring ing I have not been able to get any water out of my shower or hot water out of the sink faucets? We are experiening a very cold spell and but with the house only being two months old I can't imagine that we have frosen pipes. Can the pipes have an air block and how do you unblock it?

Are all the problems in the same bathroom?
If they are it is likely the pipes are frozen.
Do they go up an outside wall?
If they are frozen try to find any exposed pipes before the taps that don't have water.
If they are in a closet or under a sink try leaving the doors open and raising the heat in the room.
You can use a space heater or a hair dryer.
The big concern is if the pipes split and when they thaw out you can have some serious flooding.
If you are going out I would make sure you shut off the water to the entire house. Make sure someone is home when these pipe thaw out.
Sometimes you get lucky and they don't split but I have seen houses with tens of thousands of dollars in water damage from this situation, especially if its on the top floor.
As for the air lock theory I wouldn't bet on that. I have never seen an airlock that would cause a problem like you describe.
Gook Luck
Ken