Looking for advice/insight

Had something happen to me 2 days ago. Never happened before. I was gaming at my desk, was happy enough doing what i was doing and out of nowhere get a sudden rush to my head, makes me instantly stand up and walk out the room and start pacing up and down the hallway, like at any moment i was about to fall down and die. I splash cold water on my face the lot. After a while it calms down but the pressure in the head lingers and still today (day 3) it’s lingering. From my research it seems to be signs/symptoms of a panic attack, something I’ve never had before. These last few months i worry quite alot about death and how I’m going to die and what age I’m going to die, pair that with the fear of not being able to learn how to drive due to low self confidence in my ability to do so. My father bought me a car for Christmas so that has definitely added a pile more stress to get a move on with lessons. These past 3 days I have been constantly researching brain diseases, aneurysms, tumors, hemorrhages, bleeds on the brain etc. doing anything i can to rule out any of those being a potential cause along with hoping i never experience one of these again, scariest moment of my entire life. Now i’m just contemplating calling my GP tomorrow to get some clarity. Anyone with advice would be greatly appreciated thank you.