Be very careful with this, you could have underlying health problems, such as vitamin deficiencies, autoimmune conditions, etc. Doctors are very good at gaslighting people with symptoms of fatigue into thinking it's their fault, it's psychological, and you need to just push harder and exercise more.
Well, now my health is permanently destroyed and I was put on useless psych drugs for years which made me worse because no one believed that I had physical health problems. Now, it doesn't matter what sort of mood I'm in, I am ill and incapacitated in many ways. Don't let your fatigue turn into CFS if you can help it.
If you're feeling fatigued at all please check to see if you've got any rouge blood test results, lingering infections, and so on. I had the B and D vitamin levels of a sailor with scurvy for years, and many problems have festered since then, because no one believed I was illl.