Can someone help confirm I'm not crazy?

[Tmomma123]

OK so my ex isn't entirely sure he is the father of the child I'm pregnant with. I say he is and I'm totally sure. So this is kind of just to confirm that I know what I think I do and I'm not crazy..

OK so I slept with someone else between Jan 16-jan 25 (I don't remember exactly when).
I slept with my ex several times from Feb 5- Feb 13. My lmp was Feb 13.
I found out I was pregnant on 03/23/15 via a clinical pregnancy test.  Which put my due date at 11/20/15.
I had an ultrasound at 17w5d and the BC of the U/S my due date is now 11/11/15.
I believe that with how pregnancy is actually dated (from lmp and not actual conception) that there is no way that the first person could be the father. Can anyone help me

[PreguntonaPensativa]

Your bf.

[teenmomma1998]

Estimated Due Date is 11/11/2015
Gestational Age Today is 38 week(s), 1 day(s) or 8.77 month(s) months.
Date of Conception 2/18/2015
First Fetal Heart Tones by Doppler: 4/22/2015 to 4/29/2015 (11 to 12 w)
End First Trimester: 5/6/2015
Blood Draw for Serum Integrated Screening: 4/15/2015 to 5/12/2015 (10 w to 13 w 6d )
Nuchal Translucency (NT) Ultrasound: 4/24/2015 to 5/15/2015 (11w 2d to 14 w 2d )
Quad Marker Screening: 5/20/2015 to 6/24/2015 (15 w to 20 w)
Best time to evaluate cervical length in patient with risk factors . After :5/27/2015 (16 w)
Best time for routine anatomy ultrasound: 6/10/2015 to 6/24/2015 (18 to 20 w)
2h OGTT in women not previously diagnosed with diabetes: 7/22/2015 to 8/19/2015 (24 w to 28 w)
Anti-D prophylaxis for women who are (RhD) Negative: 8/19/2015 (28 w)
Antepartum Fetal Surveillance in High Risk Patients: 9/16/2015 to 9/30/2015 (32 to 34 w)
Screening for Vaginal and Rectal GBS colonization: 10/7/2015 to 10/21/2015 ( 35 to 37 w)
Elective Delivery May Be Scheduled for Singletons After : 11/4/2015 (39 w)


Wat a website said after I put yur due date in so it sounds like yur boyfriend plus yuh had yur period after the other guy so no worries