14th October I was scanned and told I was 7 weeks and 2 days. What date did I conceive. I was on the pill so LMP not a real one.

You can't really know for sure unless you can remember the exact date you ovulated and the EXACT day you had sex. Even if you had sex the day you ovulated that may not be the day that you conceived because sperm can stay around for several days in your body.

That's the reason you get a estimate due date because of that reason but a sonogram can be more helpful and estimate your due date as well. Even with the estimated due date, you can have the baby two weeks before or after or days before or after.

Congratulations!
Also check at BabyCenter | Homepage - Pregnancy, Baby, Toddler, Kids

According to my handy dandy Gestation Wheel, if your scan on the 14th said you were 7 weeks and two days, you conceived on or around September 6.