Thanks for posting your query.
After reading your query, it appears to be hormonalin nature.
There may be 3 possibilities: Hyperthyroidism
, Cushing's disease and pheochromocytoma
Possibilities of pheochromocytoma and hyperthyroidism appears to be high.
Have you undergone renal function testand serum electrolytes?
Presence of high BP at young age with palpitation suggest the diagnosis.
You should consult with physician/endocrinologist
and go for thyroid profile, serum ACTH level and epinephrine and norepinephrine
level with urinary VMA. and CT/ MRI scan as adrenal pathology are best visible in these scans.
You should also go for renal artery stenosis
and should go for color doppler study of renal artery.