DNA on Ancestry

I have gotten into this DNA stuff on Ancestry. I never knew who my bio father was but I thought maybe I could find something. Of course there was several distant cousins. I was able to link a few people to my family tree. But nothing rock solid had appeared.  And today I get a message from Ginger who said we were a close match. I open my ancestry page to see that we share almost 2000cm's. Ginger just found a half sister!  She is missing a full blood sister named Patty. Patty was 2 or 3 years old when she was put up for adoption. Ginger was hoping I was Patty but I was 100% sure I wasn't. My family tree connects to my mom's line perfectly.  Ginger and I share the same father. Ginger is the oldest.  Patty is a year older than am. We will keep looking and maybe she will find us.