Angelia,
I really think you are pushing it to try to go back to work this soon. I had only radiation and no issues inside my mouth and went back to work 3 weeks after rads ended. I am a software engineer so have no need to talk or waste any energy. Desk job on the computer all day. It was the week before Christmas so the first week was a full week, the second a 3 day week and the third was a 4 day week. It was waaaaaay to soon. I was exhausted at the end of every day. If the second and third week had been full weeks, I could not have done it. It was six weeks before I was really up to full time work. Standing up in front of a class all day and talking takes a lot of energy, not to mention the prep time. If I were you, I'd give it a couple of more weeks before I went back to work. Your body needs time to heal.

Take care,
Eileen