Yes, it happened to me 12 years ago ! On my other sisters 65th Birthday, she told me that I had another half sister ! So, I set out to find her. In 1 week, I found 3 Aunties, 2 Uncles, 3 cousins I knew nothing about, then within 8 weeks, found my sister !!! I used another member of the "new " family as a middleman. I gradually traced the new family until I was talking to her. She knew of me, but because her Mum had told her lies of my Dad, well then , she never was interested in finding me out. I got lucky. An old new Aunt got someone in the area to find her and it turned out that she went to Bingo with her every week ! So, she approached her and asked whether she knew of me, and if she did, was she open to me phoning her. The rest is history ! We corresponded gradually 4 months until a holiday was due to me, so I took the opportunity to go and see her. My husband wanted to go with me, but I felt that if she rejected me, well then I could just go into a corner on my own and cry, and didn't want him saying, " I told you so! " When we saw one another, we bonded straight away, 50 years of me not knowing that I had a sister ! She lives up North whereas I live Midlands so not always able to see her, but I am in contact with her family. It was in the newspaper both up there and here ! Such an amazing experience ! I got to see a family I never knew I had got , to meet new Aunts, Uncle, nieces, nephews . They are a lovely family and welcomed me into it like I'd never been out of it ! We all had a family re-union in Newcastle; new cousin came from Canada, Aunt from Edinburgh, sister from Carlisle, and me ! Swapping photos, contacts, never stopped crying ALL DAY ! Cousin in Canada had done a family tree from 1570 and her Dad knew of me, so she sent it me together with all of the family stories!!! Magical! When I was put in contact with her, she was telling me things about my Grandma I never knew, weird that a stranger was telling me that !
So, I say, good luck. If you don't do it, it might one day be too late ! My sister is now 72, she might have been dead, and I would have kicked myself if I hadn't of done it !
Let me know how you get on, I will be thinking about you.
Best Wishes.
Angela x