Toddler Rash?

My 2 year old little girl has been sick for it seems like the last month. (See “When it rains, it pours!” post.) Lexi’s fever has left and the swelling is down, but her rash will not go away. It is a red rash, sometimes it is little dots, sometimes it looks like bug bites, sometimes it is itchy, and sometimes it looks like little swollen stringy lines. The heat makes it worse, like when she takes a warm bath or when she gets warm running around. Her energy is back, but this rash is just hanging on. I have talked to my pediatrician this week and they said not to worry, that the rash could be around for another week or two. But, as a mom I am still a little worried about it. Has anyone out there ever heard of a child with a rash like this?