Well, it's not as bad as it sounds. lol. 9 of those months I was pregnant, and 6 1/2 of them I was nursing. It's really common for a nursing woman not to get a period.
It's only been a month since I started formula, and even then it took me a week and a half to go completely off the breast. So I'm not going to be really worried until, oh, February. If I don't get a period by February then I'm definitely calling the Dr.
Which reminds me, I need to call my insurance and tell them they have the wrong address so when they sent me my new insurance card (back in September) it never came to me.