Of course you know all the tricks--soup, tea, honey, lemon, booze, sleep, warm cat, good book, more soup, more booze, more cat, more sleep.
I always get con crud. I think partly it's because I don't get out on a daily basis, so I don't develop immunity to the germs that are floating around. Then I go somewhere, spend time in close contact with a lot of people who bring their germs in from all over the country, eat less healthy food, get too little sleep, ...
Wishing you a speedy recovery.
Pat