mumstheword, regulation of the monthly cycle depends on a regular day/night cycle. I know it can be hard with kids about but it can certainly happen! I have to suggest at this point that you make an appt to see a specialist in tcm fertility (a little to complex to try and diagnose remotely!) as natural medicine is the best option for getting back to your natural pattern. If you need a referral let me know where you are and I'll do my best for you.