I've been restless and I don't know why

To give some context, lately i've (young adult) just been in this mind-altering state. Like I have been addicted to a lot of songs and constantly putting them on repeat, discovered a new game that i'm quite addicted to, switching to other hobbies, and now i'm even trying to use an instrument.

Whenever I try to go to sleep, I listen to some songs so much they stick in my head, then I just have this need to play it again and again. And I feel this restless feeling, my heart starts to pound as well but not in a nervous type of way. Then I still force myself to try to sleep, though I still get that incomplete sleep due to me doing this.

Also my sleep schedule has given me this type of happy-tired feeling. I don't know how I even ended up doing this in the first place. Also I don't know if the reason why i'm doing this is because I have something serious coming up soon that I have to do.

I mean, I enjoyed being in this mind altering state. But I noticed that I feel disappointed when I don't feel that happy-tired feeling anymore. Also I feel a sense of happiness when I immerse myself into different things and end up forgetting about things like my hunger. I've been eating minimal food lately due to forgetting.