What's the difference between a psychiatrist and a psychologist?

I was seeking therapy from a social worker and seeing a psychiatrist for my medicines. I didn't like the psychiatrist, and I still don't even though he's my only option to deal with. Maybe it's the whole process of them I don't like, or maybe it's him personally, or probably it's a mix of both, but I don't know. The first time he did the whole interview thing, even going into such questions as "Has anyone ever mentioned you being dropped on your head as a baby?" I LOL'd at that question, but yeah they seem to mostly talk about symptoms, prescribe medicine, and then do follow ups based on how the medicine is working. It just doesn't seem very personal to me, and I don't like it. Mine is out of state as I am home away from school for the summer, so I rely on phone calls, and sometimes I have to call him 10 times before he will even return a call. It's very frustrating.