Everyone feels that to some extent. I have my perfect life too - 3 children, adore them all, great DH, great extended family & friends.
So I really sympathise. Try to calm down, and be pragmatic - this isn't karma, or hubris, it's a virus. And all we can do is take all the measures to minimise our risk. So self isolation, and social distancing as far as humanly possible. That means staying at home, unless your outing is essential, and I mean essential. And wash hands, wash everything. If your partner is still working, distance yourslef even from him. Just for now. It's not forever.
Think of it this way - the virus might be anywhere, and I'm going to do my best to stop it being anywhere near me, but even if it does get me, I'm likely to survive. Even the high risk groups have a better-than-not chance of surviving. It's the highly prolific and contagious nature of this virus - the sheer numbers involved - that produces the high death rates.
And finally - I do feel the same as you. It's really, really hard 