Anxiety of uncontrollable bodily responses like vomiting or passing out?

I passed out twice at blood draws after seeing my own blood in a vial, and ever since then I have panic attacks before getting my blood drawn. I literally can not keep my eyes open because im so scared of passing out or vomiting from seeing my blood. Im a grown adult and I had to have my mother come with me while i get my blood drawn and guide me into the place because I just couldnt open my eyes and it was humiliating especially because there were little kids doing just fine. I have a similar thing with vomiting, where im so scared of vomiting after an episode of food poisoning, that I often get panic attacks in vehicles or foreign countries. Anyone have similar experiences? what did you guys do to fix it? I have ADHD and was diagnosed with generalized anxiety as a kid but never had real social issues or panic attacks until like 2 years ago