Increase Blood pressure. Test is normal!

My mother's bloodpressure has increased a lot since covid.Many medicines have been changed but to no avail.From time to time the blood pressure rises so much that it cannot be controlled.A few days after the heart's problem was caught,The doctor said she  had bradycardia.Then after giving the medicine, she got rid of it.Now there is no other problem except blood pressure.Many medicines have changed like (t-shert trio  6.25; clorothelidon, telamasertan 40;80;20 and many other medicine ).There was no gain in anything,From time to time it is fine, then she  become like that again. Cmc Vellore gave this medicine (temsion80) But nothing is happening.Blood pressure has been rising since my mother covid became positive.My mother had a seizure during covid  Positive.Now after doing all the tests it became known that 1.ECG-Normal 2.sodium potassium-low 3.IgE -high 4.other test is normal