Your presence is needed of course. How you'll get the visa when you're in your country with your passport? Your visa sticker will be pasted on your passport. Nobody knows if you'll take 2 times for the medical test. At least two weeks the minimum to complete everything. Why the urgent need to go home? You left your heart to someone special? It's to your advantage in the future if you have a residence visa here. Not unless you're self sufficient to support your self there then why are you here and your father in the first place?