Thank you that's what I thought been then I started to freak myself out I def did not want it to be guy on 3/15 I really didn't know him and I made a mistake but does it matter that my periods are not very regular....and I got concerned because doctor never reassured me either so I started reading to much and freaking out and stressing myself out.....
No, sweetheart, the guy on 3/15 was far too early to have anything to do with the pregnancy. If you had gotten pregnant from that event, you would have been told you were three or four weeks further along. Ultrasounds are not usually that far off, and never this early in the pregnancy. And, of course, you had a period after having the sex with him. It would appear from both ultrasounds that you conceived around April 8 or 9, and given that you did have sex on April 9, well, bingo, that is the dad. I hope this is not disappointing (that you are not wishing it is the guy from March 15), because there is really no way it is.