You are doing the right thing getting this checked out. Dont feel like you are wasting anyones time, thats what they are there for. Not long until your appointment. Let us all know how you get on.
As for ramblings, this site is perfect for it lol, not that thats what youre doing!!
HI, You are booked with your GP so you have done right to get and appt there. I can't answer your questions, but you aren't being silly or a nuisance and you should insist on further tests. You need to be able to get on with your life, knowing that all is ok and at the moment you are in limbo. Be firm with the GP and don't let them fob you off.
Friday isn't far off now.
Hang on in there
Good luck with the appt