My Lou Lou had hives a few months ago, I woke in the middle of the night to her face being so swollen that her eyes were almost swollen shut. I took her to our vet at 4am, he gave her a couple shots and sent us home.We ended up giving her benadryl too and then the poor baby got a yeast infection! Went back to the vet for some more meds. She never threw up but was very sleepy for a couple days, she wouldn't play with our other dog for a few days either. Make sure she is drinking plenty of water! Hope she feels better soon!