Symptoms?HELP?!!?

Please help I don't know where else to seek help,two years ago went to the regular doc for intense itching of the skin that leaves raised fingernail trails--I will itch until I am black and blue--this mostly starts on my arms or neck but it is not particular where it starts.I mostly get this at home but I have occaisonally had it when out.I am at work all day and don't usually itch. I always seem to get itchy at home in the eve.My doc gave me allegra which does seem to stop this itching but she did not really check to see what is causing this malady.Also it seems if I disturb my skin,like changing clothes can start this itching.I have dogs and a moldy/wet basement.I am not sure if I have candida(I am pretty sure)or if this is an allergy to mold or something else.Oh I heave gained a lot of weight in the past two years!I know one of you has help for me!Thank you Tweet