Well, to cut a long story short - I think that I need a new, 'switched on' GP. I took everything that I have learned from all the lovely angels on here and armed with my meds, my vitamins etc and went and saw a functional medicine specialist 17/09/19 - WOW, for the first time in my life I was talking to someone who was not only a thyroid patient themselves, but a GP as well as a Functional Medicine Specialist, someone who understood EXACTLY how I felt past and present. She was SO excited that somebody had taken the initiative and done a DIO2 gene test. I now have a path forwards in my life and it has been a revelation!!!
I also now have her blessing to source T3 privately and she will monitor my progress.
On the other hand - my own GP who 'consulted' with the NHS Endocrinologist I asked a referral for. This is what the response that came back... absolutely cod's wallop: "sorry for the confusion. The endocrinologist I asked advice from was not convinced about the genetic testing issue ('there is no genetic variant which affects the conversion of T4 to T3'), and although he agrees that some lab tests for thyroxine are affected by biotin the (Local hospital) assay is apparently not. As a consequence they wanted to update the tests so they could advise on thyroid doses in pregnancy. I can understand your frustration at getting different information from different places. Let me know if you want me to do anything further for you.
Conclusions: my GP is being fed bullshit by the Endocrinologists who should know better having specialised in the endocrine system.
As far as relying on the GP/midwife etc. for controlling my thyroid meds when I get pregnant...no bloody ways...from now I'll take and keep the advice of my functional medicine Doctor.
Footnote: ditch the current GP and keep going till I find a 'switched on and educated GP' - a tall order but I accept the challenge!!!
Wow...so frustrated and ever so annoyed