Hey bek....Here's my thougts on this...And they are only thoughts as I am not a doctor...Just someone who suffers from anxiety. My anxiety comes about because I am a bit of a hypochondriac. Basically I get nervous in situations where I think I might be sick...Or others are sick around me that might get me sick...And I won't be at home in my own bed, bathroom, etc.
Perhaps since you were just sick, and other family members were sick...You were nervous about the whole situation causing all of the nervousness to turn into anxiety. After I am in a situation like this...Sometimes I think that I am sicker feeling than I actually am....And the mind does a great job convincing me of this! Lol!
Try getting more comfortable with getting sick...I know it sounds stupid...But getting sick really isn't that big of a deal! I used to have ibs so basically I sometimes really needed to go to the bathroom, and this caused me to get nervous on long car rides when bathrooms weren't close by...Thus causing my anxiety.
This doesn't mean you are a hypochondriac...Just that you are worried about being sick...Or your family getting sick....Or you are afraid of catching something.
After a particualrity nasty bout of food posioning...I made it through just fine, and I can deal with my panic attacks and axiety much better!
I hope this might help a little.
Claire