Can you live off protein? Do you need carbs?

Right now currently I only take in 1 cup of oatbran a day and this is my only carb serving the rest of my day is fish veggies and chicken and one snack with 1 cup fat free cottage cheese and one serving of almonds. My calorie intake is 2200 I'm 18 I do p90x everyday which I'm pretty much conditioned to now but other that workout I'm pretty much sedentary the rest of the day other then being a busser at outback steakhouse my macros every day are fat = 59g 6 sat 8 poly And 28 mono. Carb = 150. Fiber = 50g. Protein = 246. Im 18 I weigh 155 and Im 6'0. Thank you ahead of time for the help!