I have had a terrible itchy rash on my upper chest and neck for 8 days now. The nurse I saw at the Walgreens clinic diagnosed it as a heat rash. Well, it has cooled off but my rash is still bad. I would say that for the same amount of time Olive has been a picky nurser pulling off and crying alot which is not somthing she normally does. Just a little while ago when she latched on I felt a pain in my nipple. Even now after nursing I have some shooting pains in my nipple. Could it be that we have Thrush? Could the rash on my chest and neck be yeast?