I think you might have touched upon the reason why you did drink. Did you stay in your house all day all night? Even though it is your house and place of comfort getting OUT of your house and doing some real things helps your mood. That sunlight gives you vitamin D and that fresh air is good for your overall mental health. When I find myself feeling down I get outside, sometimes I kick myself in the butt outside but once I am there I start to feel better. You dont even have to go for a walk, just get a chair and a book and sit outside for 30 mins.
And if you do decide to go to the park or something you dont even have to talk to people. Just being around them helps stimulate your brain and gets good chemicals released.