Pregnancy Conception Timeline: Identifying Potential Father

Question
Hello, I have been very confused since I found out I was pregnant. My lmp was approx June 13 (from what I can remember) and I had just gone off birth control 2 months prior so period has been very irregular. I had intercourse with guy #1 on days June 16,17 & 22nd on the 22nd he did not ejaculate in me he pulled out (there was precum) and had intercourse with guy #2 that night as well until now everyday and he has been ejaculating in me everyday since June 22. I found out I was pregnant on July 13 and my hcg level was 124. On July 20th hcg level was 4888. August 1 was my first ultrasound and dated baby at 6w6d crl of 0.85cm EDD being march 23. 2nd ultra sound September 6 said I was 11w5d and ultrasound tech said that was fetal age. How is that possible to be the fetal age? Every calculator thus far has said date of conception was June 27th. If fetal age was 11w6d that means I would have concieved June 15/16 which does not make sense to me. Who is more likely to be the father????

Answer
Dear Elle,
The confusing thing about 'fetal age' is that they count it from your last menstrual period, not the date of conception. So if they say that the fetal age is 11 weeks, 5 days, that means that the fetus is actually only 9 weeks, 5 days old. According to their calculations based on the size and development of your baby, the conception date was on or around June 27th. Because the dates of possible conception from both men are so close together, I don't know if it's possible to know which one is the father without a paternity test. You can ask your doctor or midwife to be sure.
Best of luck,
Sheva