Poor puffy Piper

Piper is really sick. I'm worried about her. A week ago she had an allergic reaction to something, I think a bug or spider bite. Her eye lids and cheeks got all puffy. We took her to the vet and he confirmed it was an allergic reaction to "something". Because she's so tiny and we were afraid the swelling would get so bad and could affect her airways, we allowed her to get an antihistamine and cortisone shot. I'm not a fan of cortisone because it's a steroid. But she looked pretty bad. Anyway she was fine until last Friday then her eyes started swelling again. I guess the medication had worn off and all her symptoms came back. That's what drugs like that do. They suppress the symptoms, but don't heal the problem. So now she's worse than ever, especially since she scratched and gave herself little wounds around her eye. She has to wear a cone around her neck to keep her from scratching her face. She looks like she just got out of the boxing ring. I think she probably has an infection now too. I've been giving her homeopathic meds and an herbal immunity serum, but there's no improvement yet. I'll most likely end up taking her to the vet again tomorrow. I don't think I'll let her get another cortisone shot though. Her vet bill last week was $120 and now we have to go again. So much for having a calm week for IVF! I wonder What's next?