My 13 year old daughter received her 2nd shot in early June. Wit...

My 13 year old daughter received her 2nd shot in early June. Within days she was itching everywhere (only a few areas looked like hives around the bikini area). It is now January, and she is still itching everywhere (no hives or rash). They finally put her on prednisone, and it is making it worse. They say this all could be from the vaccine and she should not get the 3rd shot, but "there is no way of knowing." I just called the doctors office because the prednisone is making it worse, and they want her seen again within 24 hours. Anyone else having this problem? She's been allergy tested, and had blood tests-nothing shows up. Any suggestions for further tests?