There's lots of worst case scenarios all over the world happening right now, that doesn't mean we can't be sympathetic when someone's going through a really rough time.
I can't be of help, Lonelymum, except to say that I've been there. Dh worked away during the week for 8 months last year only it felt like an eternity. Every night alone I would feel completely paranoid and terrified of someone breaking in, or ds1 being ill... but mostly of someone breaking in. Every little noise at night freaked me out. I had a doorstop wedged under my bedroom door at night to delay intruders, had every worst case scenario rehearsed in my brain. I made every excuse possible to let ds1 sleep in my bed, even though I knew it meant neither of us slept well, just so I knew he was close by and safe.
During that time we got a rodent infestation - the noise at night is horrendous - maybe it was only mice, but it sounded big like rats under the floorboards - never saw them as we moved too soon (the cow who fleeced us for our house would have had to deal with them ... ha! Another story).
Then one night ds1 started reacting badly to the Hib booster he'd had - he got a really bad cough and could hardly breathe, but by the time I phoned the out-of-hours doctor he'd be sitting in my bed playing happily. I phoned 3 times that night, and talked myself out of a homevisit every time because ds1 seemed better each time by the time he called back. In the end, I caved and phoned dh and got him to drive back in the middle of the night because I just couldn't deal anymore.
That sounds like I'm a complete flake. Hell, I probably am. But also looking back, it's amazing what I did cope with as well, considering I've never had much confidence in either myself as a human being or as a parent. I have the utmost respect for every single parent as a result - I do not know how they do it day in day out. At least I knew that eventually we would move and be reunited. I also feel that I became a lot stronger from the experience and my children have a better, more confident Mummy as a result.
Hang on in there, love. I'm thinking of you.