I actually have a degree in Mathematics, but LOVE graphic design and photography =)
I always enjoyed drawing and creating things, and took art classes in high school. Once in University, I selected art classes (drawing, sculpture etc) for the majority of electives. So, 'art' is nothing new to me.
Digital art/creating began in my last year of university when friends of mine needed a wedding program designed. I, of course, was more than happy to design it (student with little money yet with a service they could offer? seemed like the perfect wedding gift) *she smiles*
And that is where my digital design started. I absolutely love it, and would not choose another occupation if it offered a salary of $1M/year!