What Causes Dizziness And Pressure In Temples?

I have a concern about dizziness I have experienced from time to time.. Let me say first I have had heart tests and brain scans to alleviate those possibilities. Anyways, the more I think about the dizziness, the more I m dizzy. Bright light from screens can give me dizziness and I feel tension in my head but no pain. Just pressure especially in the temples. The hospital diagnosed me with vertigo years ago but I really dismissed that thinking they had no idea what else to diagnose me with. What do you think?