Like Gramps said do NOT take any chest pain lightly and if you have not sought answers by now and it is still giving you trouble please do so. Especially women display chest pain related to heart trouble in varying places and at varying degree's. i.e. the reason women have been misdiagnosed for years of heart problems.
It can always be something as simple as pleurisy or a strained muscle radiating the pain but always always better to take a few hours to get answers then to wait it out making the chances for serious damage higher. Please dont think I am trying to scare you but play it safe when your in PM and your meds might actually be masking the the intensity of the pain.