Anyone ever hear of pityriasis rosea?

Yes: Pityriasis rosea is an acute, self-limited, exanthematous skin disease, most likely due to a virus. The rash commonly begins with a "herald" patch. A few days to two weeks later, oval lesions similar in appearance to the herald patch, but smaller, appear on the trunk and proximal extremities. Most patients don't require treatment. There are plenty of images of the rash on the web.