Hi Anarchy,
I agree with the rest that you need to be honest with the doc so you get the right help. that said if you are very nervous about going (as you sound) then perhaps it might be a good idea to write out a list of what you want to bring to her/his attention before you see her/him and to prioritise the list so that you get the most important things said first? also so you dont forget anything!
the other thing is that if you dont tell him every little thing at the first visit dont beat yourself up because you can always make another appointment! chances are a doc will pick up on one symptom that might mean you have a certain problem and then ask more questions to assertain a diagnosis and those questions may cover a range of the other 'little things that bug you'.
bear in mind though as someone else said you may be sent to a specialist if the doc suspects something outside her/his expertise. all you can do about that im afraid is follow the steps until you finally get to where you can get the care you deserve.
good luck to you and well done for having the courage to look after yourself both for you own sake and for your girlfriends/wifes!
take care
biiv