Is it normal to be afraid of succeeding?

I'm nearing graduation for a degree in the arts. I have a 3.8gpa- main focus in photography. Next to the few students who either can afford all the expensive equpiment or who were brought up around it, I'm one of the best shooters in the program. I know I have an eye for this kind of thing. But... I'd give my left pinkie to not have to graduate yet and enter "the real world" once more. I'm almost 30, attending school was kind of a last stand against a bunch of other things that never worked out. I have moments where I think I cam really do this. Get a business plan together, make some money for once... But they are rare and few. Most of the time, nearing the end of school scares the hell out of me. I don't think I'll make it or even be able to make enough to cover my student loans and other debts. The economy blows, who the hell wants to spend money on photography let alone art. I don't fit in with the usual crowd in this field. They find me... Odd, abrasive, abnormal... I don't know. But, I've tried a lot of things since i got my first job at 16. Turns out the only thing I have any talent for is this. Make this work or hello mcdonalds for the next 40 years. But I just can't seem to take those first few steps toward really attempting this. What if... I actually succeed? Im not sure I can keep up with it. Deadlines, professionalism, business modles, rubbing elbows, fighting competition, pant suits and contracts... I don know which scares me more.