Hope you get feeling better soon.
When I have what you've described, I do what makes me feel better, hopefully it's just a bug and in a few days you'll feel better.
A few days of sick and off plan is not a crisis or a deal breaker, your plan will be ok.
I'm sure all of us have food and drink we prefer when we are sick. For the stomach/intestinal flu, I like Chamomille tea, crackers, 7 up, peanut butter and crackers, for colds and other flu, I like chicken soup, chamomille tea, the heating pad, tomato soup and crackers with butter on them, and ice cream or popsicles for my sore throat, or my fave is DQ malts, for my sore throat.
A few days of being sick is just something we all have to deal with now and then, and do what we must to feel better and get over it.
When you are feeling better, then you can worry about getting back on plan.