Hi after giving birth to my daughter June, 2006 I started having my period every other month. However I have now not had one since September 2007 I go through the cycle every month but that's all I breast fed for 8 weeks then changed to bottle feeding what could be stopping them?

That can be normal. Especially if you are breast feeding. I breastfed for 15 months without ANY and then got pregnant.

It can take up to three years for your body to re regulate its hormones post partum. Particularly if you breast feed. Call your ob/gyn and ask if you should come in. Otherwise, don't worry.