The average adult should sleep 7-8 hrs, less than that and you may have sleep-apnea... many people do and don't know it... it runs in my family...
As far as dizziness, I have recently read that there are crystals in ones ears that get out of wack from time to time, look this up, there is an easy remedy to correct this, though if this condition did occur it is more likely it will occur again... I have wondered if the crystals are hyper sensitive to frequency which would play a part...
I grew shooting way before hear protection was a thing... Loud rock concerts, bars have played a toll on my ears, I am always striving for clarity as the ringing disrupts understanding words... annoying, always asking someone to repeat themselves...