I need advice on my legal standing with my bio-dad and my adoptive dad...

I'm 46, born and raised in the Bay Area of Northern California and now living in Omaha, Nebraska. My mother had me at 18 as an unwed mother. My biological father has denied parentage (left the state when he found out he knocked up my mom). Then I was adopted by the man my mom married when I was 1 year old. He and my mom separated when I was 15. My adoptive father and I became estranged almost 30 years ago and haven't spoken.

I did have one dinner with my bio-father when I was 21 and no contact since then. I was able to find my half siblings that he had after me on Facebook and my one brother verifies that some family members have verified that I "exist". My youngest half sister has listened to family members that say that I was only contacting the kids because I am a gold digger ... She won't speak to me. I am not a gold digger, but, rumor has it that both my biological father and my adoptive father have made out very well over the years in California real estate. From time to time I wonder if I will ever see a dime of inheritance from either one, and if I have any legal grounds if I'm not named in any wills... I have had abandonment and attachment disorder issues throughout my life relating to male abandonment stemming from these "fathers" leaving me at formative places in my life... Money doesn't solve those problems, but, it wouldn't be a horrible thing to have, maybe buy a house, have some financial security in my lifetime...