Sept 14-16 Due Dates

Kirsten • Pisces. Dreamer. Free Spirit.
I never had a period in December, which I originally thought I had conceived in November. My first US (January 26) measured at 6w6d. At my 20w appointment baby girl was measuring at 20w2d. So my due date is technically still 9/16 but obviously ranging right around there.
Can you ladies give me an idea when your LMP was, or when you ovulated to have your EDD around this time?