Can someone help me please? I really need to know what do I have exactly and what's the cause of it. The first time it happened to me I was sitting in front of my computer in my room and the downstairs phone started to ring so as I got up I felt light hea

The. The symptoms you describe are "near-syncope" and "syncope" these are concerning symptoms because they signify a sudden drop in blood pressure, which decreases the blood flow to your brain. It is important to figure out why this is happening to you. You might be anemic, it can happen from medications you are on, from not having adequate nutrition, from having a neurological disorder, and from many other conditions. It is very important to have a complete medical workup for your symptoms and I advise that you see a doctor for testing.