Hello~Please, if the pains are sudden and you know you haven't done any work to make strained muscles, then go to your ER, in fact, go anyway, even if you think you have strained a muscle, it is always better to err on the side of caution.
Hi - if you are experiencing a sudden onset of chest pain, please go to the emergency room and get it checked out. This is something that always warrants getting medical care, and isn't something to try to treat at home.
Let us know how you are.