hi welcome to HCM
-i had gone through your query and understand your concerns. i would come up with the possibility of MENOPAUSAL SYNDROME is the cause for your sufferings.
-due to hysterectomy
( ovaries are present or removed ? ),you are already suffering with physiological menopause
.but your healthy life style may prevent the appearance of the symptoms
-now with increased ageing process and decreased resistance power, the problems ( symptoms )are open up.
I hope this is helpful for you, thank you