I had sex March 14th with Guy A , which was on the second or third day of my period, (condom on, he didn’t get to ejaculate cause I was uncomfortable and we just had to stop after a few seconds) , moving forward I have old texts that I might have had my period April 11th or 12th but I don’t remember vividly but I know that if I didn’t get my period and this is around the time I got back with my boyfriend I would’ve been freaking out , but I do remember taking a test April 10th and it was negative, but in April I had sex with my boyfriend in the last week forsure (don’t remember other days in April but we didn’t have sex in March at all either ) which I was ovulating (24-29th or so) but we did it the day before and on my ovulation day forsure, then in May I took a pregnancy test 7th and 11th and those came out negative , until may 14th and I got my positive pregnancy test. So I’m due January 16th, may 15th I was in the ER And they couldn’t even see anything yet , so 4 weeks , and may 26th I had a dating scan and I was 6 weeks . June 9th I was 7 weeks and 6 days , also I talked to my doctor and she said there’s no way possible because the dating scan would’ve been 4-5 weeks off , so 4-5 more weeks than what I am, so as of right now I’m 18 weeks and right now I would’ve been 22-23 weeks, my doctor said it’s impossible and also 3 other nurses I spoke to at the doctors office , also got a dna test with the other dude and it’s 0.00% FROM DDC and I been seeing mixed things , good results and some girls saying theirs was inaccurate so now I’m scared all over again. At this point with me not remembering exactly what day I had my period in April, would it matter ?? cause the only day I had sex in March was the 14th on my period , I didn’t have any sex around my fertile or ovulation window in March , which doctors go based off last period cause you normally conceive two weeks after your period and everything which I had no intercourse around that time, so if I conceived that day I would be 6 more weeks than I am today. (I’m 18 weeks, would be 24 weeks if March).that would be the baby being 6 weeks behind or 4 -5 weeks behind and my baby is healthy . My due date would’ve been either December 5th the day I had sex or December 17th going based off my period in March, but my due date is January 16th.