Once you're done with the antibiotics, try the Terconazole cream (vaginal suppository) and an external cream called Nystatin and Triamcinolone Acetonide Cream. That's what I took last May for a really nasty yeastie, and it worked very well. Prescribed by my gyno.
No booty while you're on it, and you can take it during your cycle if you have to. Do the full 7 days.
I've found that UTI's can feed into yeasties, and UTI's are almost always caused by not peeing after sex (or condoms, both in my case). It could definitely be an allergic reaction to something...
But more than likely, your poor cooter is just exhausted. Give her a break. Make him go pee in a cup to make sure he's not reinfecting you with yeast.
And good luck! I completely and totally sympathize... this stuff sucks.