I am also a psych undergrad who recently decided to go the BSN route. I haven't started yet because I live overseas.
You have some options. You can look in to an accelerated program which is for people who already hold a Bach. degree in another field. The programs are typically 12-24 months depending on where you go.
I recently learned that some traditional 4-year BSN programs will allow someone in our situation to join their program since we already have the general education requirements completed.
So no you will not have to start from scratch
I would find a school you want to go to, make sure they are accredited
and look at the prerequisites required. With my psych degree I am missing important classes like A&P and chemistry. Good luck to you
I wish I would have realized my interest in nursing BEFORE I got a psych degree :/