Periods, eating disorders and overtraining

Have you tried looking for a local Well Woman Clinic, even if your own surgery doesn't offer one a local hospital or another practice might?

Appreciate this would still mean time off work, but having dealt with a hormonal imbalance which crept up on me unexpectedly, you'll miss a lot more work if it turns out to be something more serious than if it's just the over-training and it's better to find that out sooner, rather than later.