Just want to say thanks to everyone who has given me advice. Finally got my GP to call me today and after being armed with information managed to get an increase from 75mcg of Levothyroxine to 100mcg.
Will update in around 8 weeks when I retest everything privately. As vitamin D and B12 need retesting too then.
If wasn't for this group I wouldn't of had the confidence to argue with my GP when my TSH was 2.25 and he told me it was normal and 75mcg was fine even though I still feel absolutely rubbish.
Thanks again.