thrush or long taste buds?

For the past 3 months I have notcied that my tongue is extremely white particularly after eating something.  I can bursh the white coating off but it eventually comes back.  It sort of looks like each individual papillae or tast bud is covered with white plaque.  i have sone some research on thrush and it doesnt quite look like the pictures i have seen and there is no white stuff on the sides of the tongue.  At times the tongue does appear to have a yellowish tint to it.

I went to my family doctor and he scrapped my tongue but said there was no indication of thrush.  I did however brush my tongue before going in so i'm not sure if i may have ruined the results.  Do you think this is the case?

I read online that you can spit in a cup of water when you first wake up in the morning to do a self test for thrush and wait 30 min to see if you have stringy spit at the top or a pile of white spit on the bottom.  after doing this I my results came out showing I had it but i dont know how accurate ths really is.  

- Does this sound like thrush to you or how can you tell if you have it?
- Do you think I threw off the results of my test at the doctors office by brushing my tongue ahead of time?

Thank you for your time and help

[scottma]

Your descriptions are not consistent with classical presentation of thrush. Seeing an oral pathologist or oral medicine specialist to establish final diagnosis is advised.