Ohio child support laws?

My fiance is about to give birth to a kid that I'm pretty sure is mine, but who's it is is besides the point. the point is when we got together she said she was already pregnant, and she specifically told me that because she is pregnant during that time I don't have to worry about getting her pregnant. well truth is 3 months or so later she tells me she lied about the whole being pregant thing and that she is now really pregnant with my kid which the doctors confirmed. now all her friends and family were lied to by her about being pregant before meeting me, so to tie the ends she said the babies died at birth. my point is, i was raped by deception. I don't want the F kid, i woulda worn a condom if i knew the truth. the end result is I don't want to pay child support, and i don't wanna be with her. do i have a case?