Why do i blackout/dizzy for two seconds, i feel like my legs will drop and feel the ground move every two minutes?

Need more details.: If you are a growing teenager, orthostatic hypotension is common during a big growth period. If not, there must be some other conditions--extreme anxiety, or any medical condition that might cause a drop in blood pressure, or ? Medication side effect? Too many possibilities and not enough info...

Panic Attacks: The signs and symptoms of a panic attack-anxiety, which often last about 5-10 minutes, you should not ignore. See your doctor for evaluation, tests and referral to a specialist if needed.