I haven't eaten in 4 days and I feel just fine
When did you go for four days without food?
When I was staying at my girlfirend's house.
Going four days without food is concerning; you could do damage to your body if you don't care for it properly. You should consider ending your fast and eating.
I'm feeling great and, you know what? This will help me lose some fat anyway.
Fasting is not a very healthy way of losing weight. You have to eat healthy and take care of yourself.