14 days and no desire to relapse because I don't feel like anything

Guys, what a battle! Yesterday I was fine, I tried a martial art but today I fell into depression again. It's really bad, I've never felt like this! I just think about sleeping and not dealing with anything in my life. I've been working very hard because I'm self-employed and I need to survive. But today in particular I feel really bad, horrible thoughts about nothing going right, headache, just wanting to lie down... will this ever go away? I'm afraid this is the new me, I don't want to be like that...