I'm 27 years old, weight lifter. Woke up at 5:00, felt dizzy, nasea, and my heart was pounding fast. Was extremely light headed. What's wrong?

See your doctor. The symptoms you describe could be due to multiple conditions ranging from pre-syncope (near fainting), anxiety, cardiac related symptoms or dehydration. It may be best to see a physician for an assessment to help you narrow down the potential cause for your symptoms especially if they are recurrent. .