, so for whoever wants to possibly help me with this situation,please feel free to give me some feedback. I had unprotected sex with a guy jan 5th this year.Plan b was takin 65 hours after.It was a 72 hour pill..I had a period February 8 it was normal. Decided to get back with my ex of 8 yrs shortly after & had unprotected sex sum of jan & all throughout February with him (please dont judge) :/ but he never ejaculated in me..Which has never been a problem with getting pregnant for us in the past. In march i missed my period.I went to take a test three days after my missed period and my pregnancy test was positive.I went right away to get a ultrasound to see if I could have been further along and possibly been pregnant from that guy in January and just still had a period feb..they couldn't see anything in my uterus and they said that I must have been barely 4 weeks pregnant because they would4 sure see something in there by 5 wks..I believe I would have been 9 weeks pregnant if it were from the January 5th encounter..So that made me feel a little better about it being my current boyfriends.. Still in the back of my head I was worried and still am. I went April 8th for a 8 wk ultrasound which are supposed to be pretty accurate and I was right at 8 wks..As I should be if it were my boyfriends, it also matched up with my last missed period..so with those dates the conception date would have been anywhere between February 17th and February 26, according to my ultrasounds and missed period..pretty far off from jan 5th right ??.I had another ultrasound 14 weeks to see the gender which was May 17th and it said I was 13 weeks which was a couple days less far along than i thought..but I know ultrasounds are not going to have the same exact dates every time & that's pretty normal for them to be a couple days off even a week.I guess that's where I'm concerned ..I can't stop freaking out about whether or not it's possible for me to be pregnant by the guy I was seeing in January and not my long time boyfriend..This is a horrible feeling.. I called the people who gave me my 8 week ultrasound and asked if it was possible for it to be a month off and they said one week at the most .. def not a month..an 8 week ultrasound is supposed be very accurate because the baby is still so small they all grow at the same rate up in till about 13 weeks..Which makes me feel better cuz that would mean it is in fact my boyfriends for sure..Also all my morning sickness went away right when I was supposed to be 13 weeks I wasn't even able to hear the heartbeat at 11 wks because it was the baby was still too small..So as far as all that gos I think I'm good, and I really do think it's my boyfriendS..I just can't stop worrying about it it's driving me crazy!! Please help reassure me.