Dear Chani,
I don't know anything about plantar fasciitis, but I have developed something similar over the past few months. There are certain points at my heel that hurt and both the area as well as the pain has been increasing over time. My doctor sent me to a dermatologist with that, as she believes it there might be something causing infection in the deeper layer of skin tissue. My appointment is on Thu, so I can give you more details later.
You should definitely get some help with your problem. What I have noticed is that to avoid the pain, I lean unevenly on my foot, and this is already causing pain in my back. Plus, the limping I do in the mornings is not the most graceful
I hope you'll feel better soon!