I Have Sarcoidosis And Have Had It For About 5

I have sarcoidosis and have had it for about 5 years it has so far affected my lungs and my lymph node in my chest now I have a severe itch all over that wont stop I tried Benadryl and hydrocortisone cream what else can I do to stop this itch it is so bad it is keeping my up all night even though I take ambien to sleep