When will my side effects go away?

I went to the doctor because I kept getting migraines and he prescribed me topiramate. I took one for two days and then started feeling dizzy, confused, blurred vision, and feeling other side effects. I called the doctor and he told me to stop taking the medication. I stopped taking it yesterday and I still feel slightly dizzy and confused and still have blurred vision. I've been drinking lots of water and Gatorade and been sleeping and napping. How much longer until I stop feeling so weird? I only took the pills twice. I'm 19 years old.