Hi,

Abscence of your period for an extended period of time is one of the most fabulous benefits of breastfeeding. Less than 7% of women fully breastfeeding have their period when their baby is under 6mnths of age. About 37% get it when their baby is between 6-12 mnths, 48% between 12 and 24mnths, and for a lucky 8% it doesn't return for over 24mnths. So, you are well within the range of normal. Personal experience? Got pregnant with no 2 when no 1 was 15mnths old, without ever having a period. Got a fabulous 22 month break whilst tandem feeding 1 and 2, then got pregnant with no 3 - had 15 mnths before my period came back with her.
Regards
Barb