Thanks for providing more information.
Well feeling fatigue,exhaustion,sleepiness all the time can be associated with anemia,Thyroid dysfunction,low blood sugar levels,vitamin deficiency,low blood pressure.
So a clinical examination by your regular doctor should be considered.
In the meantime you should hydrate yourself with plenty of fluids.
And try Gatorade energy drink.
Also start a multivitamin.
Your doctor may advise further blood work like CBC,ESR,Thyroid function test,blood sugar.
Your blood pressure should be monitored as well.
I hope this helps.
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