My granddaughter is two years old and within the last two days has had a severe reaction to the Amoxicillin she has been taking for an ear infection. She was just released from the hospital today with IV treatments and is doing better but her hives keep popping up, subside in certain areas, then here they come again. She is just miserable. She is on 8 different medications to help take care of her reaction to Penicillin. How long will it take for her to finally heal from this?