Lately every very late night apx 2am~till i go to bed i feel like not breathing in enough o2 = slightly light headed. is this normal?! healthy female

Go to see your doc!: While the causes of what you are experiencing may be related to anxiety, other potentially more serious causes need to be excluded. Therefore, a thorough history and physical is essential, with special consideration to the cardiac and respiratory exam. Also, bring a list of any current medications or stimulants you may be taking.

Not Normal: May be you feel you are not getting enough o2, and start hyperventilating and that makes you dizzy but have it checked with you doctor.