I definitely can relate to you with all of this. When we got Princess she was just as sick/if not sicker. We took all the xrays and she had the air and mucus in her lungs. She was put on Clavimox also, but it did not work either. Tell your vet that it is not working and he needs to switch medications. Princess ended up being in the emergency hospital-in an oxygen tank 2 hrs away for 2 WEEKS!! It was awful and expensive. They had to "tap" into her chest and pull air out of her lungs. I will keep you in my prayers-I know how you feel, just think positive and keep us posted