I have dizziness when i lie down or get up quickly. happening for a few months. last week a slight headache appeared behind my eyes?

Dizziness: If this is a lightheadedness that occurs on getting up from a sitting or supine position it could be due to fleeting swings in blood pressure. Checking your bp sitting and then standing would detect this. If you're experiencing vertigo on head and body motions, an inner ear disturbance is likely. The headache was nonspecific,however. If symptoms persist see your physician for evaluation and advice