Hello, sorry you are having this issue. When you get dizzy and faint, is it directly after you stand up?
Orthostatic hypotension is something my son suffers from. https://www.aafp.org/afp/2011/0901/p527.html
So, when you stand, your bp drops a bit and that causes this dizzy and faint sensation. My son has actually fallen which is one of the true dangers of it, injury from a fall. His is related to blood sugar and hydration.
Why do you sleep with an ice pack on your head?
Normal resting heart rate can very well begin at 50 for some people. If you are at all athletic, it can be even lower and be normal. Now, I guess from time to time, resting heart rates lower than 60 will be given the title of bradycardia for other people. Has your doctor used this term with you? IF your doctor feels your heart rate is too slow and you have bradycardia, then your doctor should be working with you.
Are you on any medications? A lot of time, borderline bradycardia is not treated but if heart rate becomes lower and lower, they can use a pacemaker to safeguard you.
I don't tell you that to scare you but rather to point out that you are not in that category where that is necessary at this point. And again, I don't know your age and activity level or at what time of day your heart rate has been monitored (during sleep, it's not uncommon to dip below 60) so that information would be helpful.