Yes, you will be at a disadvantage. Not every school accepts February scores, and a majority of people already have their applications in. They will have less time to look at your application and a lot of spots have already been given away. It doesn't mean you don't have a chance, but it does mean you will have less of a chance than if you applied with the same numbers in September.
Sorry to be such a downer
You can try to apply this year, or have you considered taking a year off?