I have a resting heart rate of 126, my pulse has been very fast for months now. bloods show high white blood count. i have a temperature, feel dizzy and feeling of pressure in my head. my blood pressure is high but gp is still trying to find the correct m

Abnormal: having a high heart rate for months isn't good; this may result in eventual cardiac muscle failure; conglomerate of symptoms with high HR and BP, as well as elevated temperature and dizziness may indicate systemic cause- I would check thyroid functions and consider pheochromocytoma as a possibility; u need some in-depth work-up. Good Luck

Pulse: have you been checked for an over active thyroid ? That would account for your symptoms