When I worked in psych, a fellow counselor asked the same thing and said, "Do you talk to yourself" I stated Yes, but I don't have full conversations, or otherwise, I will trade places with the patient.
Also, something a bid off topic, we had to drive onto an island or bridge to get to the work and someone was talking about patients being crazy and this was my response" I think they are normal tbh, we drive across the bridge and work in an unsafe environment and do it out of free will and they "Patient" would never come here for a million bucks.
Extended response, but there is nothing wrong with talking to yourself at all.