Do you think I might have a form of dysthymia?

Hello My situation is the following. For a long time I feel tired. It fluctuates but generally I am always tired or else my energy period is very but very short. I feel an emptiness. I have been feeling bad for a long time too. I feel more and more miserable. Yet I feel more alone than ever. I find it hard to laugh. Let's just say that it rarely happens that I laugh heartily. I feel good, but it doesn't happen every night. I rarely feel real pure joy. I feel more in neutral than anything else. I am a very light sleeper. I have to put in earplugs but even then I hear everything and it wakes me up. I function, I still work and I'm fine. In the last two years I have become more and more socially awkward. I don't know how to act normally. I am sometimes anxious.