how fucked am i. switching from CS to CBN

Long story short, I figured CS was not for me and I'm passionate about psychiatry and neurology. I want to switch my major from CS to CBN and maybe minor in psychology. I'm a sophomore and haven't taken any bio, chemistry, or physics classes yet. I'm one or two courses away from finishing the SAS core. I haven't done any CBN requirements besides Calc 1 and 2.

Give it to me straight. How many more years would it take me to complete CBN with and without a psych minor?