What to ask your doctor about non Hodgkin's lymphoma

Some questions you might ask your doctor

The glands in my neck swell up and go down again. Does this mean I have non Hodgkin's lymphoma?
How can you tell if I have non Hodgkin's lymphoma?
Am I more likely to get non Hodgkin's lymphoma than anyone else?
How common is non Hodgkin's lymphoma?
What are the different types of non Hodgkin's lymphoma?
What does low grade and high grade lymphoma mean?
Can I catch non Hodgkin's lymphoma from someone?