Hi , Chest pain
occurs due to many conditions (pathologies of lung /muscular/ skeleton /cardiovascular /GIT.....etc ) and after reviewing in ER it was not fatal and treated accordingly.
Secondly most of the lump in breast are benign and many resolves by its own , many have hormonal
So dont worry lump which is not there have not bursted but resolved by its own and your chest pain was not fatal one( probably due to muscular ) and will be relieved after few medication
Thanks n regards