Ganglion Cyst

Concerned about my ganglion cyst that I've had for years.. recently it has gotten infected. I went to doctor and all he said was to let it run it's course and gave me antibiotics. It has progressively gotten worse each day. Today I woke up with some white spots where the main cyst is. Any advice or suggestions would be helpful. I attached photos showing how it is today and when it started to get inflamed.