Ganglion Cyst?

About a month ago I noticed a pea-sized bump on the ulnar side of my left wrist. The bump is immobile and does not hurt. I have been seen by a doctor, who said that it was probably a ganglion cyst but that they would xray it if it would make me feel better. I agreed that it would make me feel better and had it xrayed. I did not get to see the xrays, but was told by the doctor that they appeared normal. The xrays were also sent to a radiologist that called them normal. This satisfied me that the knot was probably a ganglion cyst.

However, I have read that ganglion cysts are soft and rubbery to the touch. The knot on my wrist is not soft or rubbery. Rather, it is rock hard and feels like an extension of the bone. I was recently seen by a nurse practioner for reasons other than my wrist, who commented that it didn't feel like a ganglion cyst, but like part of the bone.

I am concerned that the "cyst" does not feel like a cyst. Should I seek another opinion or trust the xrays? I feel like it is nothing because it did not show up on an xray but do not want to be naive if there is something going on here that I should be concerned about.

Also, is there any relationship between ganglion cysts and lipomas?