Is your life generally in order? Do you eat healthy? Do you exercise? Do you regularly see daylight? Do you avoid electronic devices after x o clock and stay away from doomscrolling? If not, go fix that basic human needs shit, nothing will help you if you don't. You don't need to be a health nerd but everything alive is a process and you need, at the very least, to give the process what it needs and make sure you don't interrupt it. Meet your basic needs. Have time when you do a lot of things and you go hard, physically and mentally. Have times when you deliberately relax, and you slow down, and you do nothing that takes physical or mental effort. If you want to be relaxed and feel okay, this isn't optional. Except maybe if you're neurodivergent, sometimes those folks need other modes of operation, but generally speaking, yeah.
If you're confident that this isn't your issue, it's time to speak to a doctor.