Can you tell me who I am pregnant by? I had sex with a friend sometime in the first week of august I had my period from august 13th to august 19th then a week and a day later I had sex with my now boyfriend bt I concieved around sept 2nd.

If . If your doctor indicated your conception date was on or about 2 september 2010 and you did not have sex with your male friend since the first week of august but you have had sex with your boyfriend since then - it sounds like your boyfriend is the father.
If . If the dates are accurate then your new boyfriend appearss to be the father. Especially if your period was of normal intensity and duration in august.