Thank you all for support and advice in my previous post about looking for my birth mother - just to update and then to ask for any other input.
My birth mother and father married each other 1 year after my birth and I believe I have a full brother, born 1 year after their marriage. I now know the full address and even a telephone number (used private investigator in the end who confirmed the address I already had found) for my 'biological parents'.
I am now even more confused. My brother is in his 40s and I am assuming (their house looks VERY middle class and perfect) that they haven't told him that he has a sibling.
Or maybe they have? My overriding fear is that I will cause devastation in all of their lives and that my 'brother' will hate and resent me and/or his (our) parents.
It hurts that they have had a family life together without me. Sort of feeling like I've been denied the life I should have had, and someone else had it instead
I just wanted to reassure them that I was happy and healthy and had a wonderful mum & dad - now I (sometimes)think f*ck 'em - I bet they've kept me a dirty secret and live in constant fear of me finding them.
FWIW I am a happy person with no 'issues' and no negativity to bring to them - but I just ache inside because I think they will reject me most strongly.