Going to the dentist is ****ing expensive so I usualy dont go

Anyway in august something wierd happened to one of my tooth(or is it teeth a **** it).

The gums on one of the teeth had retracted quite a bit and on the area now exposed I am very sensitive. For a day or two it hurt to eat but then it became better.

Now it has been like that ever since. I dont feel anything when I eat. But a big part of the tooth is still exposed that should be covered by the gum and if I scratch on it with the toothbrush or my fingernail it hurts.

Is this something that might go away by itself or do I have some kind of ****ing gum infection that needs treatment Anyone know?
I realy dont have the cash to dish out for a dentist