Worry just never ends

The sore in Mellow's mouth has gotten smaller and less "angry" according to his vet, but still there. Another two weeks on antibiotics, if its not gone at the end of this round Doc will take biopsies to see what else might be going on. He tells me not to worry, Mellow is young and healthy, but can't help but worry anyway. Yeah, OK, overreaction from what happened with Levi I know, from a seemingly happy, healthy dog to so ill and gone in a month, I still can't get past it.