I do not want to do anything. Is this addiction?

Sorry for mental health kind of question, but I do not know better place to ask about this stuff.

Nowadays, I lie down on a bed and just watch twitch streams all day, with a little bit of browsing lemmy in between. I do not want to do anything, pretty much any activity seems to cause exhaustion. So, I just do bare minimum and return to bed, watching twitch for over 5 hours.

Another is that I feel I cannot do anything good enough. I cannot study effectively, cannot do menial tasks without being stressed. This is especially concerning for me because I am taking a graduate program, but I also doubt I could do any kind of real work. I just don't think I have capability to read complicated texts and remember it clearly, write a decent piece of literature on some subject, or just about anything at all.

Is this related to addiction - can addiction make me feel exhausted all the time? Also, how can I escape this permanent lethargy? Any tips would be greatly appreciated!