You survived it, coped fine and your body did its own thing - what it needed to do.
I'd be inclined to say I'm not sorry you threw up, I am really sorry you had to experience the distress through it.

One must come to accept that vomiting is just a natural process. Imagine if you treated peeing with the same level of anxiety - it would be torture. But just as noone gets excited about peeing, we should take the same "it just happens" attitude to vomiting too. While none of us will ever be perfectly happy to just accept it, I will always do everything in my power to avoid it happening, I'm trying hard not to go a bit crazy with the anxiety of it. And when it happens to me next time I'll to address it in a similar way to when I go pee - clean myself up, close the lid and flush. I'll probably complain that it didn't feel good at the time, for sure. But as you said, you felt much better after.
Just a thought in the few months I haven't been on here