Looking at your post, you filed Early decision, which had a financial aid deadline of October 31. You have until January 2 to accept admission or give up your seat.
https://www.oberlin.edu/admissions-and-aid/arts-and-sciences/additional-information/early-decision
Did you sit with your parents and run the net price calculator?
If yes, are your parents ok with numbers (remember it make not be accurate for divorced families or business owners).
Oberlin states you can still apply if you missed the deadline.
The big question is whether you will receive a package in time to make a decision?