Selling Art Work

Well, my high school art teacher asked me if i wanted to put up my work that i turned in not to long ago in to the art gallery for sell. I agreed. I need the money but i don't want to part with my work. I feel like a child. I have only really put in at least a weeks worth of work in to the three pieces that i put in but still. They are the best i have done so far. 50% goes to the school to buy art supplies and the rest goes to me. I put them for 20 to 45 dollars if i sell all there at the minimum price i will get receiving 30 dollars the max i can get would be $67.50 which will be enough to get me what i want now. If i don't sell them, well at least i get the chance to put my work in a gallery and i can just tape my pieces back into my book. :$

i'm just nerves, thats all, Hopefully they don't sell