What a relief it's not WC! Sorry to hear you're having a bad run with illness, we've just had the same. DD had a cough for a little over 4 weeks and was treated for croup and tested for WC. Looks like it was just a nasty, lingering virus. I had it too, an awful cough for 10 days. I was tested for WC as well but it was also negative. I felt like death though.

I hope you guys are on the mend soon