If you are going to sell the house in the next few months, there is no way that you are going to meet the 2-year ownership requirement. The exact date that your ownership starts isn't going to matter. You aren't even close to 2 years of ownership.
The fact that you have lived there for 7 years doesn't help to meet the ownership requirement. The 2 years of ownership and residence are two separate requirements. You have to meet both requirements.
Claiming a deduction for the mortgage interest, or not claiming it, has nothing to do with the ownership or residence requirements.
