If my last period was September 9th 2006 when did I get pregnant if I am 22 weeks along

I'm no expert but I'm guessing it would be after you ovulated when your period ended and if you have a 28 day cycle, it would be between 12-14 days after the first day of your period. Then again I'm no expert, you should clarify this with your physician.

If you have a regular 28 day cycle,(and provided you ovulate at typical 12-14 days after the first day of your period) your conception date would most likely be Saturday, September 23, 2006. Congrats on baby