I know how scarred you must feel! I've had seizures for ~25 yrs now. Been on phenobarbatil, tegratol, dilanton, deprokote, klonapin [as well as combinatins of all of them. Currently, i'm taking felbatol and keppra.
Taking new medication while tapering off older medication can take it's toll on life. Changing medications is very frustrating [not only for the person; but, to anyone living with them]. Anytime my neuro changed my meds; I would cring - the stress level would immediately be felt. A lot of things happen when changing medications. Getting used to what the new medications side effects are while dealing with the effects of tappering off non-wanted medications can be overwhelming. Seizure activites can increase while you system tries to adjust to not receiving one type of med and still deal with adjusting to newer meds. It throws your system topsy-turvy for a while. Once it does make the needed adjustments, then dealing with the new medications side-effects is another issue. If that can be successfully accomplished, all is well again.
Good luck and hang in there. Best of luck to you.