Composer, Heal Thyself

This is a tiny piece of a long episode of visiting various Russian-composer and Thomas-train doctors. In this part, Ben visits Dr. Tchaikovsky. Some of the dialogue is hard to understand, so a brief transcript follows.
Alex: "Get on the scale for that," [says Dr. Tchaikovsky.]
Ben: So he [I] climbed up on the scale.
Alex: Oh. He [Dr. Tchaik] said you weigh pretty high.
Ben: Oh. I'm feeling pretty sick, Dr. Tchaikovsky.
...[cut], then:
Ben: I'm feeling a bit sick.
Alex: Oh, that's too bad, said Dr. Tchaikovsky.
Ben: You help me on the job. First, I'll fix you.
Alex: I can fix myself, said Dr. Tchaikovsky.