Thank you everyone for thinking about me ,and responding.
My mother's mother was bi-polar and never properly managed her symptoms - swung wildly from high to low constantly,despite lithium and frequent admissions.
My mother - despite being left in charge of her 4 younger sibs during gm's numerous hospital stays and witnessing bizarre or suicidal behaviour - has always been in total denial about Granny's ""turns".Choosing to describe them as "nastiness" and" bitterness at her husband" - my g'father had a second family who he spent most of his life with while working,but abandoned forever and later denied ,once retired....(still with me?)
Mother sympathizes totally with her poor father for "having to look after his nasty wife"
The other family were traced by m's youngest brother years back,but ignored and denied by everyone else.Disappeared now.
G'mo was "deb of the season" when 18 and very beautiful.Only became unwell once married 
Mo trained as paediatric nurse at Great Ormond St.But only ever worked the odd shift once we were all at school.
I was told that,if I wanted to stay at home once I turned 16,I would have to work as a nursing assistant and apply to train after a levels.I wanted to do art and drama but was told drama was out of the question - totally ridiculed and scorned -and that art could only lead to a job in advertising - very low and dirty...(wtf)
I "rebelled" and trained as a psychiatric nurse.
My parents have completely ignored the specialism of my career - I have been senior for many years (cbt and psychodynamic extra's...)They consider me a "nurse" .In the old traditional,diminutive role play sense...iyswim...
I have been theraped and theraped.Both for supervision/professional development and periods when I have fallen to bits.
My mother - and I know I can't be truly objective - is,I am sure without any insight whatsoever.She is rigidly defended and in utter denial about everything not within her absolute control - her "zone"
When I have - even gently - attempted ANY conversation/interaction with her ,that is spontaneous,led or initiated by me or transpires to be "outside the zone",she will either dissociate/blank/shut down; become old fashioned hysterical,as in scream jump up and down flail limbs;or spit out evil,venomous barbs-personal insults....if it is just me and her...if anyone else is around,she dissolves in tears and becomes helpless.
It was always so,all through my childhood.
I know she won't/can't/has no wish to change.The entire family see all her pain as being entirely my fault.My brothers used to remember witnessing her abuse of me.Now,they consider that I "planted" the memories into them, as a teenager.
I was chaotic as a teenager and in my 20's.Allegedly,they knew this wd be so ,since I was a "cold baby" who pushed mummy's breast away !!!!wtf
My professional knowledge and insight enables me to have a perspective on them,and me which tbh ,is more a burden than a help .
Because I function at a very high,competent and capable level.
Allocation of resources and services,in MH, are driven by the assessed level of the individuals' capacity to function .
I have,a fair few times,fallen to pieces in Dr's appointments,with Health visitors,midwives and counselors.They always appeal to my professional knowledge,status,role,insight and the evidence that I am coping,day to day to conclude that I'm ok.Really.Relatively speaking maybe ,but just look at what you cope with...
That must be true.It must be a good thing.
It is also the exact same dynamic that existed and exists between me and my mother/entire family.
In addition,in my job,not coping,(certainly where I live now,though not where I trained) will likely lose me my job.I am on the way there anyhow.
Then,I won;t have the income to be so capable in supporting 5 dc and me.
But,yes.I will cope.That is a bit of a burden to be honest.How crazy is that.