I Have Server Itching All Over My Body Including My

I have server itching all over my body including my hair dry skin that won't go away and it feels like bugs crawling on me.Rashes on my back,breasts ,arms,legs,hair and I have diabetes.Known of my prescriptions are working any more gabapentin 100 and 300 mg,diazepam,ammonium lactate and hydroxide 50mg and meclizine 25,lantus insulin 40 units, thyroid pills , thyroid pills, sertraline,ranitidine 300mg and vitamins.I stopped taking, my vitamins for awhile.But I still was itching, and all of my doctors know what I take.