What Causes Headache And Pressure In The Chest After Taking Advil?

I just took two normal Advil for menstural cramps, with out water. The cramps have stopped but in the middle of my chest (feels slightly below my sturnum) is an uncomfortable burning sensation, which is causing a headache. It hurt a lot so I drank water and ate some grapes, some carrots, and a banana. It s now hurting less but comes in flashes, with little pain to intense (not unbearable but certainly disconcerting) pain. Any explanations or ways I could get the pain to stop? (Note, it does feel like I m producing more saliva as well.)