It seems obvious that what he actually has is an anxiety disorder which can manifest itself with chest pains and insomnia when the person is under extreme stress [like getting your ass kicked in the SEC championship game]. When things calm down [perhaps he's now even taking meds for the condition] you pretty much return to normal.
If you've seen the transcript of his wife's call to the emergency room it [in my mind] confirms this diagnosis: first, she's pretty calm and talks about the chest pains being related to anxiety, and then says he's taking ambien [no doubt for the insomnia]. He just signed an incredible class of recruits, which should help relieve some of that competition related stress.