Oh, you poor soul!!! As if you don't have enough on your plate at the moment, but it's often the case that someone trying to care for another eventually picks up anything and everything that's going around, You become run down and worn out without even realising it, so as soon as you feel able, start pampering yourself a little. Eat well and try to get some rest. Sometimes even half an hour of total relaxation is worth several hours of broken sleep, and when you're caring for someone you love it's difficult to relax enough to sleep properly in case they need you. If you haven't already, try making a batch of tasty soup and store it in the freezer (if you have space at this time of the year). Then, if you become ill again, at least you'll have something hot, tasty and healthy at hand without much effort.
Take care of yourselves, keep warm and try to make time to relax a little.