It's amazing I've spoken to a few friends today who've had or know of people who've had similar experience.
I'm not sure what to make of it really. Such an odd experience. Thanks for the replies keep em coming.
Turns out my dad had a child before he married my mum. I got a twitter message yesterday from him and spoke to him last night. It's bloody wierd.
Anybody else had a similar experience and if so what happened, how did it work out ?