I ve experience dizziness black out and faint, start with i hear noise in my ear, sound like a buzzer or some high pitch noise. several hour later starting to feel dizzy then i faint and black out for about 5 minutes. After im conscious i fell lower abdominum pain a little bit of cramp. but its gone in a few minutes. I ve check with cardio doctor my heart is healthy. i do have chest pain sometime wtih no reason and was perscribe stress relief medication which help. and doc diagnose my chest pain as stress related symptom. so far i still dont knowwhat cause fainting. i had a very long black out fainting about 5-7 mins twice in 4 months and several dizziness