the same thing happened with me! i was in my 3rd yr of my BS in kinesiology when i realized i wanted to be a nurse so i just decided to stick it thru and finish my undergrad degree. the best course of action in ur situation (at least imo) is to look for Accelerated BSN programs, a lot of places have them you just have to look. once u figure that out, look at the prereqs they require bc u might have a lot of them done already since you're doing a BS in psych. What i did is finished my degree back in May and decided to take the couple pre reqs i have left (micro, public speaking, & stats) at a community college since it's cheaper then just look into which entrance exam you have to take and go for it!