"I had unprotected sex after taking plan b ( this would have been the time I was ovulating), then got bleeding a week after for 7 days. 2 weeks after I had unprotected sex with guy number two and he ejaculated in me ( time I wld have been ovulating), the day after,guy number one essentially raped me but did not ejacualte. I am now 15 weeks pregnant and nOt sure who wld be the father. Does plan b make you ovulate after taking it? Could I have gotten pregnant from guy number one?

There is no way to tell who the father is. You have to wait and have genetic testing done.

kcomissiong is absolutely correct. There is no way to know without a proper DNA test, especially since there was only a day between partners. On top of that, even if he "didn't" ejaculate, it doesn't sperm from pre-ejaculate didn't find its way to the egg.

Agree, there is no way to tell from the info you gave us.
First plan B is not 100 percent effective and the longer you wait after sex, the less effective it is. So it can be any of these men. You will have to wait and get a DNA test done after the baby is born.