That is what the NHS link I posted says:
Quote - "You can ease most heel pain yourself at home. If it doesn't go away, see a GP."
It then suggests 5 things to do and 2 things not to do to resolve matters.
Then it says go see a GP if there is no improvement with home treatment, if the pain gets worse or if you find it difficult to walk.
If you go straight to your GP with heel pain and no obvious history of injury and the symptoms of fasciitis, in the first instance the GP will probably give you the advice contained in the NHS web site (mine certainly did) - it is part of the diagnostic pathway (i.e. if this works, that is what you've got, if it doesn't the GP moves on to the next step).
The site also mentions referral to a specialist by the GP and lists signs and symptoms for other common ailments apart from plantar fasciitis such as bursitis, tendonitis, fracture, arthritis and peripheral neuropathy but advises against self diagnosis.