newly diagnosed

My son who just turned 11 has been diagnosed with generalized epilepsy. We noticed staring spells this past summer and by the end of summer they were becoming more dramatic. His EEG showed the spike wave for absence seizures. The pediatric neurologist our family physician referred us to started him on zonisamide, seven days later he had a tonic clonic seizure for the first time. they increased the zonisamide and a week later he had another one, the next day two more and the next morning another one. He was having seizures and sleeping more than he was awake. They started him then on Depakote through an IV 600mg. He is taking 250 mg (depakote ER) in the morning and 250 at night, plus 100mg of zonisamide at night. He did well for the first 3 days, then started having seizures again yesterday two bad ones. This morning he had one but less dramatic with a faster recovery, and really long absence type seizures in the early afternoon. Sorry this is so long but am wondering if anyone has any helpful info. I don't know if his seizures would have gotten worse anyway or if the zonisamide made them worse. I feel like I want to get him off of the zonisamide, but I am not a doctor and am probably just worried because they got worse after he took it. Any info would be appreciated!