I've read that many people here get there TOM differently during this diet.

I've been doing it for close to 4 months now and everything had been the same every 21 days. I started duing aerobic excercises that's the only different thing I have been doing now. I got my cycle and then instead of coming back in 21 days it came back in 9 days. That's never happened in my life and was wondering if it's normal and I shouldn't worry about it.

Help please.

Thanks.