Recently, i have been feeling really empty. I feel like there's a black hole in stomach. I feel so tired and sleepy all the time. The activities that i used to enjoy can no longer satisfy me. I keep having this negative thought like"i want to sleep forever and never want to wake up again " or " if i die i won't have to suffer like this anymore." What should i do? Should i get myself diagnose by professional? But what confused me is that nothing bad has really happened to me but i keep feeling low, lifeless and depressed.