L.L.
I'm not sure what tests and meds you have tried or if you have tried other doctors but I think the first thing I would do is find another doctor or take him somewhere like Vanderbilt Childrens Hospital. Even if you have to go in through the ER it's better than the not knowing. It's got to be stressful, i've not dealt with seizures but my daughter (9) went though a period about 2 years ago where she was covered in hives for about 2 months and we did all sorts of tests trying to figure out what was causing them. She was miserable and itchy and it drove everyone in the house nuts, not knowing how to fix it. We went through 3 doctors before it went away. That would be my best advice, when one doctor says he/she doesn't have an answer, go to another one, and keep going until you get it solved. Have you seen a neurologist? There are pediatric neurologists at Vandy Childrens that I have heard wonderful things about.