Scared about getting reinfected

I am so scared of getting infected again. Went through absolute hell for months. I am scared to go out on public transport and attend hospital appointments incase I get infected again. I know they say you probably now have some immunity and getting infected twice is “unlikely” but translate that into more accurate medical science is shit happens. And so far I have not been the luckiest with my health. I dont know whether to cancel my appointments until this whole thing is over,and will it ever be over really? And there will probably be a second wave of it like has happend in so many other countries. What are other people doing ? Are they risking going on transport, going to hospital appointments, going to the shops?