I had a radical nephrectomy three months ago and a clear cell carcinoma was removed. This was my second primary cancer in two years. I recovered slowly and returned to work this week. I had thought that my recovery was going well until this week. I am a special education teacher and I cannot get through a day. By 12 o'clock I am not tired but totally and completely fatigued. The problem is that I look great and hence my collegues just assume that everything is fine. Is it normal to feel like this so long after the procedure?