Random depression?

When I was in my late teens 3-530 am where often times I'd be sobering up and heading home from my night/weekend bindge of filling my body with crap to numb the pain I was feeling on the inside. Now working the night shift I get the worst depression that only last a few hours but it's every night. Does anyone else experience this? I feel like its not server enough for medication but its such an awful thing to feel all over again.