Even if they’re not difficult, they still feel like a burden, and I’m very worried that I won’t have time to do them or that I’ll forget about them. I either put them off but constantly think about them, or I try to get them done as quickly as possible and get very irritated when something prevents me from doing them. I can never relax if I have things to do, even if they’re not urgent; they’re still a pain in my ass. I don’t know why I feel this way, and I think this is the reason why I avoid difficulties and my life sucks so much.
You are not alone. Some of that stress is good. Drives accomplishment. But we need to have clear, achievable milestones. Write it down, and discard anything where you don’t see a clear outcome.
And for me, making my bed in the morning and cleaning the kitchen directly after dinner have always been the biggest mitigations for my “too much shit to do” stress.