My pregnancy wheel using the original due date of January 12, gives a conception date of april 21 with a last menses of apirl 7th. Semen does not live that long inside of you; 5 days at the most under ideal conditions. It's the second guys baby. Ultrasounds before 8-10 weeks are very reliable for dating, within a few days.
A dna test will tell u for sure
Both your first and second ultrasound back up the notion that your ovulation was nowhere near as early as April 5 or 6. It was at least as late as April 19, if not more like the 23rd.
sorry I had a sex with guy#1 on 5/6th of april and my 20 week scan was on the 4th of september not a november.
Actually, when I was doing the computations (when you and I had an exchange on personal messaging) I didn't pay attention to the 20-week scan, since you had two that were earlier and the earlier ones are more reliable for purposes of dating. (Glad I didn't, if you had the dates wrong that would have been confusing!) So you giving a different date for it doesn't change anything. You would not have ovulated April 5 or 6 and had a period on the 7th. You said your concern was that somehow the period was implantation bleeding. However, implantation bleeding is only a few dribs and drabs, not the volume and number of days you would see from a period. And it is very rare besides. And also, an embryo needs to divide and divide for several days before it is ready to implant. So please stop worrying yourself with scenarios that are not even supported by counting back from your due date.
Thanks Annie for all your help :)