Hi Chris,
We are not allowed to 'diagnose' on here, but I would say your symptoms are suggestive of diabetes, and if your fasting blood tests have all been okay, perhaps you should ask for an oral glucose tolerance test (where they give you a glucose solution to drink and then you stay there and they take a few blood tests over 2 or 3 hours). As you have bought a meter, you could do some finger prick tests too, before and 2 hours after meals. I hope a more knowleadgeable Type 2 wil be along soon to help you.
Your symptoms could be due to something other than diabetes though, so best go back to you GP anyway.
Hope this helps.
Sue