Just a warning about going to the GP based on my own experiences on this: They may end up being quite useless. This doesn't mean you shouldn't go to them, they could help and for a lot of people they do, but not all of them do.
I've got a psychologist's report confirming I have dyslexia and dyspraxia and saying I should be referred by a GP to a physiotherapist and an occupational therapist, because my dyspraxia causes a lot of physical problems for me too. I went to the GP and they knew nothing about these conditions, dismissing the entire thing and saying I only just caught both my dyslexia and my dyspraxia and that they will disappear soon, and that was the doctor in charge of the surgery that said that!
Eventually I managed to convince a doctor that this is not something that's only just occurred (though they still aren't convinced I was born like this), so they checked me physically and decided to refer me to an occupation therapist - one that only deals with hand injuries. The OT told me they had been informed I had severe hand injuries, and they knew none of the truth about my hands (that I have very poor motor control and weakened muscles due to my dyspraxia, which it said clearly in the report the doctor hadn't bothered reading), so I showed them the report and they said I definitely do have dyspraxia and need help, but they aren't qualified to do so as they only do hand injuries. Meanwhile my GP still does nothing.
Whilst not all GPs are this bad, and mine is notoriously bad for most things, it's a possibility this could happen when you go to them, as unfortunately they are only trained in "common" stuff and "general" health and medicine, they unfortunately aren't taught anything like this as far as I know. But by all means try with the GP, you could even be really lucky and get one who has either been in this position or knows someone who is and can help you. The worst thing that can happen is they don't know what they are doing, in which case you simply try another option or another doctor.