I suspect, for a few specific reasons, that the man I know as my father - who is married to my mother - may not actually be my biological father. The more I attempt to discreetly investigate my hypothesis, the more it seems quite likely. How on earth shall I ever broach this subject with my family? I feel as though I need to come up with concrete evidence first, though this is obviously difficult to do without help from those who were there. It feels very chicken/egg... I am reticent to approach my family without proof, though cannot find a way to acquire such evidence without their input.

I am a young adult now, and as I have been "raised" already, I suppose some would say to let this go. However, if I am correct, I'd like to know where I come from. Any suggestions on where to go to research things like blood type and other genetic evidence? [Such as being a carrier for a genetic disease, et cetera]. Thank you!

What are your specific reasons for feeling this way, best to share to get better answers.