That's happened to me and it will pass
Every day :x
Yup, I can recount for well over 10 times in my life that if I had a gun present with me, I wouldn't be commenting on your question as we speak. Lack of motivation is one of the worst feelings, there are ways to overcome it that are safe like buying L-tyrosine or acetyl-L-carnitine(amino acids), after a week or two you'll actually be happy and feel great naturally.
yeah, I can relate to what you're saying; sometimes, I can be so down, it takes effort doing the very simplest of things.