Must i stop taking Accutane if I have a seizure?

I was at a concert last weekend and i started feeling dizzy. I sat down for a while and felt better. A while after standing up, i felt dizzy again and I started seeing black dots out the outside of my vision. My vision then became very narrow and I lost my balance/ footing and started falling into people around me. It took me a bit to regain my footing, and then my friend grabbed me and brought me outside. One minute, my friend was hailing a cab; the next, he and another random person was bringing me back into the theater. My friend said it looked like i had a mild seizure and fell backward - luckily caught by this stranger. I read the seizures are a serious side effect. Must I stop taking it? I only have a month or two left in treatment, and for the first time in my life (I'm 35), my cystic acne is finally clearing up. Not to mention I've spent a lot of money on it (well over $1000). I know my overall health is more important than acne or money, but what if the seizure was a one time thing?