18 credit hours too much?

<p>I will be starting my freshman year of college this fall and was wondering if 18 credit hours is too much. I am double majoring in bio and psych and dont want to fall behind in either major. I would be taking:
Bio lecture and lab
Chem 1
Calc 1
Intro to psych
Spanish 2
In high school, I did (and received) the IB diploma and manged to deal with 6 college credit courses. I do plan to work and dance while in college. Is this too many credit hours for my first semester?</p>