I almost collapsed/fainted/idk in a hospital. Your thoughts?

Sorry this is so long. This is only about a half of what I want to share. My uncle got a heart attack and it was very shocking. We went to meet him in the hospital and it was about five of us in the room along with two doctors. There was a lot of equipment and wires attached to my uncle and occasionally beeps would go off. Before going in the room I felt uncomfortable in general. In the room I was getting very tired and I got this rush in my head. My sight started to blur and my legs were getting weak. I didn't say anything. I was unbalancing and catching my stance but no one saw. My sight got more burry and I needed to get out the room. I thought I was going to fall down. It was like I was zoning out of the real world. I told my sister next to me something like "I need to get out" or "Help me get out". I almost couldn't hear myself talking either. I just left the room and walked to a chair. I was wobbly, my eye sight was very blurred, and my head was still getting that feeling but very strongly. I tried closing my eyes and just tried to relax while resting my head on my hand. It was slowly going away and my sight became less blurred. I’ve never experienced anything like this and I’ve been in hospital rooms maybe twice before. I’m totally fine now but it think it was because hospitals are uncomfortable in general and there was just so much stuff going on in that room at once. Of course I’m telling this so I can hear some thoughts or things I should know about this experience. Thanks.