If you have to bathe your kitty there are several things you can do to lessen the trauma both to her and you. First bathe her in the bathtub or shower, but in a deep bucket. Clip her claws before you start, hide treats in the bathroom for afterward. Have some towels cycling in the dryer so you can wrap her up warmly afterward. Don't use really hot water, use warm and put only enough water in the bucket to get half of her wet at a time. One of my cats (a feral) when he gets bathed, I lift him out of the bucket after he is wet. I have previously spread a towel on the bottom of the shower floor and I soap him up there and then pick him up and put him back in the bucket to rinse him off. He is better with this system, because he doesn't stay wet, the water (the noise scares him) doesn't need to stay on and he has secure footing while it is happening.
Good luck with those allergies.