Hi I am new here but need some help to contact my mother

Hi everyone
My name is lynda and I really need some help to get in touch with my mother I have not spoken to my mum for nearly 15 years we lost contact over a silly disagreement and i have tried to get back in touch with her by going through Social services as she had a lot of input from them over the years due to metal health problems but they have been unable to give me much help
Her name is Kathleen Robinson she is living some where in northren ireland either in lisburn or lurgan I am really desperate to get in touch with her she is the only family i have ( my father walked out on us when i was 4 years old and i have not seen him since) apart from my lovely husband and 3 lovely children she does not even know that i have my youngerst son who is 14 years old now.
I have been suffering from bad health over the past 3 years and I really would love to see my mum and talk to her i miss her alot but do not know how to go about finding her.
Any one who can give me any help at all as to how i may be able to find her would be a great help as I said her name is Kathleen Robinson she is living in Northren Ireland her birthday is in October 16th / 18th P lease please anyone with any information on how i might be able to contact her can let me know by contacting me at lynda_kasim@yahoo.co.uk