Can't make a decision... freaking out. Help?

I understand. Maybe Barnard is a much better fit for you, I don’t know?. I am personally biased towards LACs but in your particular situation it is hard to make a case for Barnard even if you were to be accepted.

In regards to this point, although I don’t agree completely with William Deresiewicz you might find his article helpful (his book is good too):

Another good source is Frank Bruni:

https://www.amazon.com/Where-You-Not-Who-Youll/dp/1455532681

Edit:

This is a good running thread on what to expect at OSU engineering.