I think i had had tia 15 years ago cause the symptoms are the same and never had one since. i was 14 & 15 years old had it 3 times. now i am 31. ?

? focal deficit ?: Acute focal weakness can occur due to stroke, seizure, or migraine. It can also occur with focal encephalitis. A teenager should not have a TIA unless they have serious heart disease or blood disease or blood pressure disorder. You need more details about what really happened back then.

Cant be sure: Without more detail on previous events , its difficult to know. An MRI would confirm old cva. 2d echo or tee might r/o cardiac source. But its very unusual in the age group u describe. Congenital heart disease , afib , hypercoaguable state , congenital abn in the vessels in the brain would need to assessed if it found to be true.

Perhaps not an issue: You may have merely experienced an episode of classical migraine and the aura mimicked a tia. If you did possess cardiac or vascular issues, you would have had more spells over the 16 yr period of time. If you are asymptomatic, no need to pursue further, but if you do have headaches, might get this checked out.