Soda scare

Kayla
So I was at a birthday dinner for my best friend and I had ordered an orange Fanta and I hadn't noticed that I literally drank 3 huge glasses of this Soda. So by the time it was time to leave I started feeling sick and light headed and had to step outside. My ears started popping and my vision started to get blurry. I was so freaked out but I thankfully feel better now. I know the Soda was the cause but does anyone know why or has had something similar happen. Sticking to just water from now on though