Calm things down somehow to take a few steps before < edited > goes down.
Get this, $160 and you know for sure -
http://www.cvs.com/shop/product-detail/ ... uId=420841Easier not to have the drama of the fiance knowing you 'don't trust her', so you'll need at least 30 seconds alone with the kid and your fiance not around to swab your daughter's cheek with a q-tip to get a sample.
You'll get the results in a couple days, quick and easy. Don't waste even the time to post saying you know she's your daughter on the chance of paying $x00,000 over the next 18 years. Just do it.
Next, decide what you want to do. Is it you or the fiance that is having the biggest problems? Basically, if you think you can figure stuff out, I would personally encourage you to do your best. My kids were 4 and 2 and although I worked full time and the < female dog > was a stay-at-home-internet-browser, I was much closer to the kids than she was, and that is still the same. But at 8 weeks to a year of age, I don't know how you'd get close to your daughter on a part-time basis, especially with court and drama and all the stuff that is going to go down, and having to fight your way through a < female dog > just to see your kid.
I'm not sure what I'm saying really, 'cause you can just get screwed either way, unless you don't want anything to do with either of them. Or if you want to be a parent but not a partner to your fiance, you're kinda screwed. Or if you want to but she doesn't, it's a bummer too. Maybe just try to keep cool 'til the kid is a bit older, you have some status quo as an involved dad and you know a lot about how to meet your legal goals and protect your fatherhood, and then get away from the fiance.
The last is probably the most prudent option.