You said she was ok until the temp. Maybe they can fore go the temp this time since she was in recently. It would let you know if she would be ok with the rest of the exam. For a few days before hold her feet a few times a day. My Monkey girl always had warm foot pads when she was running a fever. Leave the shot for last because that could be upsetting.Well my mom is against sedating Huff&pPuff/Cami But is going to take her in first, by herself to see if helps. I will bring up the gabapentin again if she gets worse & also the vet can reassure her that one low dose of gabbapentin will not hurt her precious baby.
I'm always amazed more animals don't go a little wild getting their temp taken. If I were driven to a strange place with strange smells where they don't speak my language and the first thing they did was stick something up my butt, I'd have a tantrum too.
I wish you and the whole gang an uneventful visit.