So this is a long problem. I was kinda still nursing my last one when i got pregnant. I have only had 2 period since i had him in june of 2013. I had my first period on 08/15/14 the next on was 9/20/14 so a 36 day cycle witch was normal for me before i had him. I had a positive test on 10/27/14 which should put me right at 4 weeks. the only thing is i think i ovulated a week later than normal i should have Od on 10/12/14 but i think it was more the 18-19 so i would have been 7 dpo when i got the positive. well i went to the doc for my first app on 11/14/14 should have been a little over 6 weeks. but all the doc saw was a gestational sac and to come back in 2 weeks. that i looked more like 5 weeks. but i got a positive 3 days shy of 3 weeks ago and if you add the 3 week before that i should be 6 weeks. could i have gotten a positive earlier than i though? or could it be something else? it was an abdominal ultrasound it that helps. you would think i would know more this will be my forth child but i have never had this happen before. i am freaking out i still have 15 days before i will find anything out. any insight would be helpfull 
