one thing i have experienced a lot of, and which seems at least slightly similar to what you're describing i think, is like when you're in a sort of vicious cycle of
- never doing any homework/schoolwork because you don't feel motivated or whatever
- never doing any fun personal projects stuff because "oh i have so much homework i should do that first"
- not doing the homework either
- spend all day feeling moderately stressed but not doing anything
- repeat
i still have no real idea how to deal with this though. one thing that mildly works for me (sometimes) is to plan out, at the start of the day, what i am going to do that day. maybe i will say "today i am going to ignore homework and just try to relax somewhat", and then not worry as much about homework for that day, because today is a Not Doing Homework day, and I Will Think About That Tomorrow. and then that brief reduction of general stress can actually make it easier to get some of the stuff done the day after, since you've had a day of not thinking about it so much.
i have no idea if any of this is actually relevant to anything anyone is saying. maybe i'm just venting