Hi there ~
I understand your concerns. I think that pityriasis
rose herald patches are easily diagnosed and treated. However you might need to visit with a dermatologist
for the right medications. I also think that you are excessively focusing on the blood picture and the mild myelo proliferative disorder with thrombocytosis
might not have any meaning in the real clinical sense. However, if you feel like there is, there is nothing wrong in visiting with an oncologist
that is specialized in blood disorders.
Take care and have a lovely day!