Hi,Welcome to the HCM.
Brief..You have got autosomal recessive disease (gittlemens syndrome),which is the main cause of your electrolyes inbalance (sweating),weight loss
and metabolite inbalance.
I have gone through your history (quite long but comprehensive).Since you have been diagnosed with Gittlemen syndrome ,it is a genetic disease of kidney disturbing sodium and chloride channels.As Kidney has speciefic channels to filter ,specificaly electrolytes (ca,Na,Cl and K),if any of theses chanels gets problemetic ,automaticaly other electrolyte gets disturbed.
My opinion would be keep eye on your blood electrolytes first,as this disease is causing all your symptoms..for example,Hypocalciuria so hypercalcemia
(increased calcium) causes constipation
,low K and low cl causes disturbance in hormones (aldosterone
and renin),which can effect heart rate
Mostly this disease causes hypochloremic hypokalemic alkalosis (metabolic disturbance),which has to be evaluated and keep checking electrolytes frequently,and discuss with your doctor.
Surely my answer will help you understanding your symptoms.You may ask further without any hesitation.