first of all, please let us know if adderall
has been prescribed by a physician/ for what duration it was prescribed to you? if it was not prescribed by a physician or the duration of prescription is over , please try to stop it with help of your physician.
A regular constant pain, around heart for 1 week is normally considered ATYPICAL, but still since it is a new onset discomfort you must see your physician on priority.
the risk of heart failure
can not be gauged by the information you provided still i dont see any apparent reason to suspect same.
try relaxation techniques
to lower the stress
and try to engage in aerobic exercises
(once your issue of irritating pain is solved by your physician)
if you had mentioned your weight , i would have been in a position to make comment about your weight as well.
feel free for further queries