I just recently received the home program for the Spring Forest Qigong. I've listened to the tapes and started the exercises. Yesterday I started the exercises and felt fine until I got to the moving of yin and yang and then I started to feel upset. I skipped ahead to the ending exercises figuring I was tired and had a long day. I tried the execises again today and when I got to the moving of the yin and yang, I started to feel upset. I tried to continue on but found that I got extremely nauseous and needed to stop and lay down. After a few minutes the nauseousness subsided but I've had a slight headache all evening. Is this related to starting the exercises or maybe I am doing something wrong? I would like to continue on with the exercises again tomorrow, but I am quite nervous about it. Any suggestions?