After 5 days of suspected shingles symptoms without a rash and pain under shoulder blade around to breast area. what else could it be?

Shingle v. skeletal: Even in the absence of a rash, if you have had shingles in the past, you can still have "herpetic neuralgia, " which is simply nerve pain due to the inflammation of the nerves. Alternatively, this type of pain could occur due to "costochondritis, " which is essentially a pulled muscle between your rib spaces. Could have happened during exercise, sudden twist or even because of wire from a tight bra.