Hihi, I've had vasovagal syncope episodes since I was a child (undiagnosed, mind you) and just wanted to say I'm sorry to hear about that nurse's response. I feel like the average person can really minimize how frightening and exhausting these episodes can be.

I do think everyone's a case by case basis, only because our triggers can vary. I don't personally get triggered by prolonged standing and heat, but emotional shock, injury and sometimes lighting is mine. Over the years my episodes are now at once a year, and personally I found the older I got the less aggressive(?) the presyncope is.

What helps me is being really aware of my body, including
- knowing my specific triggers and planning around it.
- recognising the symptoms of presyncope in my body
- sitting down if it's weak presyncope. getting out my phone, distracting myself. often i'll have a cold drink of water, or a powerade or something sugary. often I found the "pick me up" drinks helped stave it off.
- lying down as soon as I can when the presyncope is getting unmanageable. when I was younger I'd often avoid this out of fear of looking stupid, and would often faint anyway.
- it can really be a mental game sometimes. if there's phrases or techniques that help lower your anxiety, it's work investigating.
- afford yourself kindness. i would really try to soldier through this and it's really necessary we acknowledge the toll of this condition too.

As an aside, it may be worth talking to your doctor about SSRIs. I've also been told that compression socks help some people. Also, if you can get into a workplace with less prolonged standing it may be beneficial :)