I believe i have shingles . two rash sites on my chest. they itch very bad. do not respond to steroid cream or other creams?

Shingles will almost always one sided, have collection of vesicles (small water blisters on a res base of skin). Often associated with burning or sharp pain sensations. Typically follow a strip of skin.

Shingles typically does not itch -- it hurts. And it usually involves only one site, following the distribution of the sensory nerve that is infected. I would not hazard a guess as to what is causing your rash without seeing it, but I am pretty confident that it is not shingles. If it has not responded to steroid cream, I would strongly suggest that you consult a dermatologist.