That sounds about normal for a first dose. Or even a second. That is why the process normally takes 3-4 doses 5 days apart. Your PF period should get longer after a each dose, but most would not push it until they have taken three doses.
Yes, you should ditch the Topamax. The info about which meds to drop is located on the board 'Clusterbuster Files' with the thread 'Playing Well Together'.