Parents might not realize that you have been doing things basically all on your own now and that you have this new sense of freedom/responsibility for yourself/etc...
They will try to treat you the way you were in high school (or in extreme cases, worse than that)
Have a chat.
Lay down your cards.
Don't be a brat, but be honest. They might put up a fight or not.
Figure out how much this means to you and weigh your choices.
Remember that they are still your parents, you might not be legal yet, and if they are paying for your schooling that they are still financially responsible for you.
Hope this goes well/helps you out.