i had this same problem with my first lil boy,
the dad ran of when i told him n didnt tell anyone of his family, i tryed an tryed to get in contact with him, but by this time i later found out he was in jail, anyway when remy was born i got csa involved who traced him to his mums address, my ex has the same name as his dad, so they refear to him as junior but the mum seen the letter and opened it thinking it was for her husband, any way she soon realise with the date of birth it was regards her son
her next move was to contact all the nadine websters on facebook were i receieve a message and rang at the time i thought it was brilliant for me an my son she could answer alot of my questions like i didnt even no he was in jail ect,
but now 2years on i think i opened a can of worms and have and un easy feeling about them being in my n my sons life, but cant turn bk the time, my boy calles my partner dady as hes the one who is raising him an has done since remy was 6 months old, its just life isnt it but just make sure you do things for th righht reason an that you can live with them in 5 years time ect x x