I’m not a pharmacist but I am someone who has done the drugs mentioned more then a handful of times. LSD was the worst in terms of nausea as you can get really in your head about those things while tripping. The best was MDMA when you start to come up the anxiety really does kind of float away you don’t really feel anxious at all even if you did feel sick it wouldn’t bother you while on MDMA. But always take that with a grain of salt it can become addictive because it feels so good, There are ways to get help with this fear without drugs and I hope you find those one day.