Poison ivy?

i think what i thought were flea bites is actually poison ivy. but here is the thing i have not been around the plant but i have been cleaning a house that i have no idea whats been in there. i have little bumps that are almost clear but red around them. and if they were flea bights i think they would of gone away by now i have had this itchy ness since friday and i have it on my arms my one hip and 2 tiny spots on my legs. how can i keep it from spreading, and can my daughter get it from me? i am nursing... so should i just wear a long sleeve shirt well holding her?