I had the symptoms of an TIA 2weeks ago.  The doctor is still doing tests because I dont have the profile at all. 105 pounds, 52, non smoker, doing sports, etc.  My cholesterol is on the high side, but the triglycerids are quite low.  The doctor prescribed 325mg aspirin, but since I reaaly dont fit the profile, there is scepticism.  But I am very worried.
Since you already had a Tia, you need to be on med. I guess ct or MRI brain, echocardiography, ECG, carotid artery Doppler, blood sugar must have been done. You need to aspirin, lower dose than 325, atorvastatin as well for cholesterol and stroke prevention. Blood pressure should be frequently checked. Tia is frequently associated with heart problems also so should be vigilant about chest pain and should be evaluated if having. So any of the above test are not done then get it done.Also, healthy lifestyle and regular exercises, low fat, oily diet will help.