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Who is likely the father of my child?
Had Sex With Guy A February 10th
Had Sex With Guy B  February 14th
Had Sex with Guy A again February 16th
Concieved "February 13th" according to online conception calculators " LMP January 30
Due Date 11/06/17
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134578 tn?1483549754
If your conception calculator is correct, guy A. How do you know your due date, was this all done by calculators online from your period? If so, you can't know anything for sure. They are just based on averages.

If you happened to have gotten an ultrasound in your sixth or seventh week and did not tell the doctor when your last period was (so he was not influenced by that) and he told you the due date, it might be more reliable. But otherwise guessing based on online info is not going to help you split the difference with these dates so close together.
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Due date is based on LMP. Had first ultrasound done at 10 weeks which said the due date was November 14th or a November 16th based on the measurement at the time
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134578 tn?1483549754
Well, don't use your first day of your last period over ultrasound results to begin the count, women have their periods and ovulation whenever their bodies feel like it, your body doesn't read a little calendar and say "Oh, day 14! Time to ovulate!"

Since you had an ultrasound in your first trimester, use the information from the ultrasound, which saw and measured your actual baby. When your last period came doesn't matter compared to that.

Unfortunately, especially since you had sex so close together with two guys, your best time to get the ultrasound would have been no later than week 7, and you got yours at week 10.

As time goes by, the margin for error (when using an ultrasound measurement of the baby to try to tell when you got pregnant) gets bigger. By your 10th week the margin is about +/-  3 days either way, or possibly even 4 days.

A due date of November 14 has conception at February 21 (in your case, plus or minus 3-4 days). That could stretch your date of conception back to the 17th or 18th. Though this seems to favor the guy on the 16th, it doesn't entirely do so, because sperm can live 5-6 days in your body, keeping the guy on the 14th in the running. His sperm would not have been dead until the 19th or even possibly the 20th. (I assume you're saying all the sex was unprotected?)

Do you have any other evidence, such as, one guy is your regular partner and you always have unprotected sex with him and have never gotten pregnant, or, you were seeing a lot of clear, copious mucus at any given time, or, you found out you were pregnant by a positive test well before two weeks from when you thought you had ovulated, or anything like that?
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Doctors and calculators all based on lmp
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134578 tn?1483549754
See above where I answered in the "Comments" box.  Don't use your first day of your last period over ultrasound results to begin the count, women have their periods and ovulation whenever their bodies feel like it and do not do so based on the calendar or when an app tells them to. If you have ultrasound evidence, use the ultrasound evidence even if it disagrees with when your period last came.
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