what would the diagnosis be for a 56 year old woman presents to the emergency department complaining of severe pain in her lower jaw and neck that has developed over the past hour. The pain is not sharp, and it is not relieved by rest or by changes in position. She took Ibuprofen when the pain started, but the medication provided no relief. She also complains of nausea that began shortly before the onset of jaw and neck pain. On further questioning, she admits to a “heavy feeling” in her chest, which she describes as squeezing or crushing sensation. She is profusely diaphoretic