maybe I am a hoe but I'm still curious

I know I'll get crap for this but... are there options out there for testing paternity while keeping it from the potential father? when I was dating my now significant other, I was a partier and things have gotten out of hand a few times. I had apparently been hanging around this one guy I know and I guess we did something's according to my best friend. so when I got more serious I had no doubt it was my Mans but here we are 2 years later and I'm thinking maybe it could be this other guy cause it's been around the same time. so do you ladies know any way I can get a cheap one without my man finding out?