I hope all goes well at the doctor's office today and that the kiddo feels better very soon. As a single mom of 11-year-old twin boys, I can absolutely appreciate what you've been going through. Hang in there!
Oh, & mine just got through a 9-day siege of "the Ubiquitous Virus", if that's any comfort! (just keep him hydrated & comfortable & ride it out)
On the wrong number thing, it used to happen to me all the time, to the point I googled my number to make sure I wasn't listed on some site! After a particularly persistant one I changed my number and have only got a handful of wrong numbers since then. Hope you have the same sort of luck! 
Commenting by HaloScan
