strange rash with 3 different doctor opinions, what is it?

For about 10 days now I have had this rash like symptom that started on my right side of my chest up near my shoulder. At first I thought something bit me cos it was itchy. A few days later i got itchy spots down on the lower left part of my stomach. Now these reddy, pink spots (which are around 5mm long, some have joined together to make one big one) are all over my chest, stomach and back in various different places and I am now starting to get some inside my thighs and inside my uper arms.

3 different doctors told me.
a. put some elocon cream on it and it should go away
b. take some phenergan for a week and we'll see what happens; and
c. its going to last for about 8 weeks and not to take the phenergan.

These spots are sometimes itchy - not all at the same time just in 3 or 4 different areas. They are only slightly raised from the skin as well.

Can anyone help