Please stop freaking yourself out, it's not 3.5 weeks between the two of you but more like 5 or even 6 weeks. Just get real and stop. If she had sex with someone else no later than June 5 and ever since it was you, you are the dad. Congratulations, and please no more obsessive worry.
She did get pregnant in July, NOT JUNE, don't worry. The guy in June has nothing to do with anything. If a doctor has looked at the actual baby by ultrasound and given a due date, it wouldn't even matter if she had a period or not, he has seen the actual baby and measured it. It sounds like she conceived around the 8th to 11th of July. Nothing to do with June. Stop obsessing, Andy, it's just your paranoia ruling the day. This pregnancy has nothing to do with an event a month before it came about.
Would say yur baby yuh can always ask her doctor questions just to be sure
First Day of Last Menstrual Period: June 26, 2015
Probable Date of Ovulation: July 10, 2015
Possible Dates of Conception: July 6 to July 14, 2015
Due Date: April 1, 2016 (40 weeks)
Wat happens When I put her due date into a conceived dating chart
Sperm can live inside a women for 5 days and get her pregnant keep that In mind..
Forgot to mention last week we went to and ultra sound on Tuesday the 3rd and by lmp she is 18w 4d measured baby and baby is 18w 4 days exact but abdomen is measuring 19w 2d. She is small, short and naturally skinny and small boned. Idk if that would play a role on baby. Again is if leaning to other guys baby or me. Thanks guys.