How Far Long Am I, My Last Period Was July 15th, 2009 I Started Birth Control August 18th, 2009 Just Found Out Im Pregnant But I Look Big?

I have three children and with my experience with pregnancy and birth control, you were probably pregnant before you started birth control... Probably right before or after you last cycle. You wouldnt have become pregnant on birth control. And being on birth control, it can do one of two things, either make your periods long and heavy or almost non-existent until your body adjusts, this would have prevented you from knowing anything is going on. Also could botch pregnancy tests. But, yes, my guess would be within a week either before or after your last period. Congrats, my dear first timer!!!!