I think I learnt pretty early on that there was something 'wrong' with me if that makes sense
It does, except it's incorrect. The only thing that's 'wrong' about you is that you had the misfortune of being born to two very dysfunctional people, who, I bet, both also had less than perfect childhoods.
Philip Larkin says it best;
"They fuck you up, your mum and dad.
They may not mean to, but they do.
They fill you with the faults they had
And add some extra, just for you.
But they were fucked up in their turn
By fools in old-style hats and coats,
Who half the time were soppy-stern
And half at one another’s throats.
Man hands on misery to man.
It deepens like a coastal shelf.
Get out as early as you can,
And don’t have any kids yourself."
No child is born with hypochondria, or low self esteem or anxiety or phobias. We have two inherent fears - being dropped and loud noises. Thats it. Anything else we learn along the way and anything your mind can learn, it can unlearn.
Therapy would help you enormously. Remedial hypnosis could straighten out your subconscious mind within a month (but I would say that!).