Ok.. So my last period was 15-02-2012 today is 1-04-2013 it says that I am currently 2-3 weeks pregnant. Does that mean that I possibly conceived week starting 4th march as that is 3 weeks from today? Or is anyone able to tell me when I conceived I am very intrested to know!

Nobody can tell you a week much less a day.

WHen you are fare enough along the doctors can give an approximate due date... you can backtrak 9 months... and from there you have a 2 week window both before and after the estimated date when it actually occurred... meaning they can only guess to a one month window.

If you have been sleeping with more than one person during that month... you are going to have to have a DNA test done to find out who it was.

Me & my boyfriend hve been together 2 years but I was just curious if it was march that I conceived so that I could work out how far along I actually am before contacting a doctor

Basically... you aren't going to be able to that on your own and even if you had sex once over that period you would still be guessing over a peroid of days when conception really occurred. (meaning it can be days later).. based on size of the fetus they can judge how far along it is roughly... but until then all you would be doing is making wild guesses.