Do i still have a chance of being something else?

I have kinda "ME/CFS" like simptons, i have an absurdly small energy envelope and take too much time to regain that small energy, exemple from the last two days:

I woke up, feeling kinda normal, brushed my teeth, did the dishes, prepared my food, alredy out of energy, ate, had to rest for around 6 hours to recover, woke up again feeling kinda normal, took a S*it that tired me too much, couldn't even drink or eat anything, had to rest for 18 hours.

I have been like this for the past 4 years, probably over a 100 doctors, a S*it ton of exames and nothing, it all started after a had covid and supposed dengue one after the other.