Ovulation and Period Post D&C

I'm posting this to two groups, so I'm sorry if you see it twice. 

When did you ladies get your period after a D&C? My doctor said at my last appointment that I could expect it in around two weeks based on my uterine lining. It's been three, and nothing. At this point, I haven't even ovulated, at least I don't think so. I've been temping, checking cm, and doing opk's. They darkened a little for two days, but I never got a positive. I also don't think I'm pregnant. I've taken about a billion hpt's, and they're negative. Any suggestions experiences would be greatly appreciated!