These practices increase blood circulation and therefore may cause heavier bleeding during your period. The Chinese medical view is that, if you find that your menstrual bleeding is increased during tai chi or chi gung practice, you should reduce your practice time or cease practicing altogether until your period is over.
Sometimes it can take a setback to wake you up to what is valuable and what isn't. I had been fighting an intense legal battle with devastating effects on my business and on my health. I had to face starting over again very late in life. I couldn't do much about the drain on my time and money; however, I could do something about the drain on my health. Thank God for qigong!