With DD2 I was never fussed about timing her solid feeds around her BF's. I just gave her some food whenever we were eating. They don't really eat much at that age, it is mostly exploring the food and getting used to it.

As for being sick, well you can hold off, but really BLS is about being baby led. If you DD is really taking to the food, then I would not suddenly hold off if you have already started, if she is just playing with the food, then you could hold off till she is a bit better. I know with DD2 I started her a couple of weeks after 6 months as we were away before then and I did not want the hassle of food at someone else's house.

Best of luck, just remember let the bubs do the leading