I get anxious as well, not to the degree you do but I often need to take the rest of the day off after 1-2 interviews and have to prep the morning to help calm

I get anxious as well, not to the degree you do but I often need to take the rest of the day off after 1-2 interviews and have to prep the morning to help calm myself down. I usually run in the morning and eat a banana an hour before. The way I was able to get offers was practicing a lot. I did leetcode, mock interviews, and then real interviews to make them feel like just another meeting. Take interviews when recruiters offer them, convince yourself you don’t care, then do enough that you actually don’t care anymore. I did this last month and only interviewed with three companies. Another hint is interview with a different team at the same company even if you’re not completely sold on that team, getting the hang of a company’s interview culture is a superpower. Hope that helps.