Lately I've Been Feeling Really Depressed Like Feeling Like What's

Lately I've been feeling really depressed like feeling like what's the use of going on. I wake up feeling like that and after bad stuff happens I feel the same way and today I got so angry I was shaking and I felt light headed and as if I had to throw up. I also had an extreme headache. Can you please tell me what's wrong because I have no idea?