I hope I've interpreted your post correctly, if not, just ignore me.
I know when I worry about things, it's often the associated unpleasantness that worries me. I live in London, always have. I never think "what if I die in a terrorist attack" because hey, I'll be dead.
I do think "what if I'm stuck in a crowd and there's a problem". So I don't go to places like Wembley Arena any more because, let's say there was just a problem with the exits, the actual fact of being stuck in a crowd, even with no danger, scares me. I don't go on protests for similar reasons. My nerves are shredded in any kind of crowd.
I tried hard to unpack this because I also don't like travel generally and used to say "it makes me anxious". Now I realise that anxiety is linked to being stuck in a situation that I find highly unpleasant. I was stuck at an airport for five hours once - I realise this happens to people all the time but for me the payoff is not worth it, especially if it was just for having a long weekend in Edinburgh or something.
it annoys friends and family, frankly, that I don't travel. I am actually going on my first holiday in years in a month and I haven't told them, but I've made a big effort for it because it's quite possible it's the last time I'll bother going abroad.
I've been in hospitals abroad and yes, treatment was fine, I was fine, everything turned out fine - but it's just so horrible (well hospitals and being ill anywhere are horrible but if you are nowhere near home, for me, even worse).
so many numpties people have said to me "don't let this put you off going abroad" but for me, it is not worth the unpleasantness and anxiety - that's before I even mention money.
so while I don't want to be seen as enabling your anxiety, is it anxiety? If you were saying "I refuse to leave the house ever again" and lost all your friendships as a result, I would be concerned. But if there are particular things that you find so horrible when they go wrong, you'd rather not do them - is that anxiety or is it just a way of asking yourself whether you are happy to do it?