You are fine. Just continue to do well in the rest of your classes. Adcoms def. won't hold it against you. I mean it was a DECADE ago. You are not the same as you were a decade ago. You are now a 4.0 student with excellence in academics. Any normal person would definatley vouch for you. That being said- you can always put a side note on supplemental applications saying your circumstances.
That being said--- I really don't think you have to, cuz ure grades are great! GL and ace that DAT!