Psychology major at UC Davis considering psychiatry—career changer looking for advice

Hi everyone! I'm a rising senior at UC Davis majoring in Psychology (BA) with a 3.7 GPA. I'm doing neuroscience research in an undergraduate lab and have become really interested in psychiatry.

The challenge is that I haven't taken the traditional pre-med science prerequisites yet (general chemistry, organic chemistry, physics, biology, etc.). I'm planning to meet with my pre-health advisor to discuss a post-bacc or career-changer path.

I'm wondering:

• Has anyone here gone from a psychology degree with few science courses to medical school?
• Did you do a formal post-bacc or a DIY post-bacc?
• If you were in California, where did you take your prerequisites?
• Looking back, is there anything you wish you had done differently?

I'd really appreciate hearing from anyone who took a similar path. Thank you!