Cysts from lymphoma don't usually appear all of a sudden; especially on the face. Just because it doesn't feel like acne, it is most likely acne. You can make a doctor's appointment, but it is not likely that a doctor would elect to take a sample of your lump. They would probably send you to a dermatologist first to eliminate that it is not an acne cyst. The dermatologist would probably prescribe you something topical or oral and suggest you wait to see what happens. I don't know much about Hodgkins lymphoma on the face, but don't imagine a doctor would give you immediate results either. You might want to save yourself some money and wait it out a while. If it doesn't go away with your regular acne treatment within 30 - 60 days, then go to the doctor.
I had a huge lump on my chin and i was freaking out but it was just a pimple that was caught under the skin and got swollen. If it doesn't go away in 4 days or so, then call the doctor but for now i'd just leave it! Good luck!