1st bout a month ago i got sick with the flu for 14 days, half way through that my head started itching like crazy, i went to a walk in and that dr glanced at it and side i was having a alergic reaction, it was also on my neck and shoulders. she gave me a cream, didnt wk went back she gave me vistaril and a shampoo helped a little but now the itching and firey burning is back even stronger, could i have shingles on my scalp?