Definitely struggle with fatigue ! I have tried everything as well and LITERALLY, this is gonna sound stupid to some, but the only things that helped me was anxiety meds(which took me years to agree to and I eventually got off of) but the one thing that helped me aside from that was yoga, breathing exercises in a yoga class!!! So find breathing classes for yoga or YouTube it and it will work! But I suggest you going to an actual yoga place and having instructor teach you how to do it and do a class with them that way you can do it at home on your own on a daily basis when you finish learning from them! It’s all about consistency what I think happened with us as we forgot how to breathe properly as stupid as that sounds and the best way to fix it is to go to classes to re-learn how to breathe but you can’t do it once and think you’re healed you have to be consistent with it until you do it as a second nature! I hope this helps