Doesn't necessarily look like a yeast infection from the pictures, however as Jemma said I would say get a swab taken so that you can be certain and get on the right medication if needed :). In the mean time try eating yoghurts and stay away from foods that are high in sugar.
Fungal infections can take a long time to heal.
After a few days of finishing the course of the Fluconazole, go back to your doctor if your symptoms have not improved.
The doctor should take a swab from your mouth. If he does not mention this, ask if this can be done. The swab will be then sent to the lab to be analysed and any fungal or bacterial problems would be identified. This will also help with regard to which medication you should be given if required.
Sometimes, you may need to take more than one course of the medication before symptoms improve.
A white coating on the tongue can also be from stomach problems and poor mouth hygiene.
Eating live natural yogurt will also help (if you are not lactose intolerant).
If you take antibiotics, these can bring on the fungal problems.