Many of us have experienced what you describe and it sucks. I hope you're able to sort it out and feel better about things sooner than later. That's generally the case.
But you and others should keep on mind that "burnout" is not a very precise or actionable word and thinking of your current challenges as being products of burnout doesn't give you much traction on what you can do about not feeling well or what external circumstances might help you recover.
Reading between the lines, and trying to be more precise, it sounds like you may have pushed yourself too hard for too long while neglecting essential self-care pracfices.
* You probably weren't resting very well (sleep; low-stimulation idle time).
* You probably weren't eating very well (fresh, nutritious food) and may not have even been preparing food for yourself (cooking).
* You may not have been physically tending to your self (being active, cleaning, dressing) and your space (cleaning, decorating).
* You may not have been keeping up with your relationships (friends, family) and your community (hobby groups, church/etc, light acquaintances).
For most people (and animals) -- when you don't do those things for long enough, it eventually just catches up with you. You're wired to do those things almost every day and the wires short out and things get funky when you ignore them for weeks or months or years as many fall into the habit of doing.
"Burnout" often suggests that the malaise is a product of what you were doing instead when that often isn't even relevant. Presumably, if you're here, the thing you were doing was something you were passionate about (impressing someone, acheiving something) and probably isn't suited for villification anyway.
Rather than just casting everything that feels wrong into the big vague lot of "burnout", try to take a minute to figure out what you were specifically neglecting and then try to get your hands dirty doing those neglected things (even if it's clumsy or slow or whatever in your fog and fatigue).