I think you should think very carefully before you leave your present practice and find another one. Your GP at least knows you, even though you don't like what has happened, and you need that sort of continuity and you will recover the trust in them eventually. You now know they record, so you can watch what you say when you consult them. A new practice would have you worried and stressed out, and you may not get a better service.
At the moment you are traumatised. You want it all to go away and start afresh, but that is not as easy to do as it sounds, It isn't just the GP practice you have to find. What will you tell another GP if they want to know why? You cannot say change of address.
Bear in mind also that your notes are not necessarily sent to the new GP. They may be sent to the Family Practitioner department and it could be some time before they end up with your new GP. That may make things very awkward for you because you would have to go through your medical history all over again.
There is also the point that most practices are full to overflowing, and you may have to settle for one further away, which would cost you more money than you can afford to pay. Some GPs do not make house calls either. If yours's does, you will be well advised to stick with him and patch things up. You may find that he has already done that, and will not treat you badly.
You just cannot afford to be stressed any more than you are now. Your health will undoubtedly go down. You could try a thread on here asking for people who have changed GPs and if it was difficult, before you go down that road.