Answer:
Depending on the school you go to, probably not. My school will not allow you to change your class unless you either filled a form to change classes in November or if its an honors class and you're failing, you'll be removed.
All depends on what your school offers so if you have counselors I would talk to them about this and see what they think.
If you don't think you're ready for honors classes I would say to the counselors as well and see what they can do but they might not be able to switch with classes already in session.