Just to send you hugs and say that we went through a really long bout of SIBO here, possibly brought on by cephalexin after a dental. Wouldn't have been so bad if we'd caught it sooner and realized that long-term soft-serve yellow poops are not normal for greyhounds! Just keep an eye out that the intestines don't get out of balance from all the anti-b's.
It will pass, hon, but it might wear you out for awhile. Sometimes this stuff happens despite people's bests efforts. You're doing everything you can. Try to take care of yourselves, you and DH, and remember you're on the same team. Catch yourselves when you're snappish, take a deep breath, exhale, and apologize. And don't forget to love on Gunny when she'll let you. (I had to work a bit to find times to just be with and be gentle with our Spencer, to reassure him that my presence didn't always mean getting a pill pushed down his throat!)
:grouphug