I had unprotected intercourse with guy #1 on july 1 & july 9. had bleeding july 16 for about 2 days. unfortunately i had unprotected intercourse with guy #2 on july 30, which i took a plan b the next day. august 10 i had a pos preg test. whos is it?

There is no certain way to determine paternity unless DNA studies of fetus and both male sexual partners. Ask your OB physician for guidance of obtaining fetal DNA studies.

The creation of the hormones that trigger a positive pregnancy test takes time. Regardless of your bleed July 16, it does not take #1 out of the picture and #2 encounter does not provide a time interval consistent with a positive test 11 days later. A cell free NIPS test can be done as early as 8 weeks to define the paternity in a way it will hold up in court. It is best never to guess.