I might have lymphoma. what should i do?

Get it checked out!: You have given no specifics, but there are dozens of types of lymphoma and your self diagnosis will not lead to a plan. Get to a hematologist/oncologist and have a work up.

First thing first: You should go to see your doctor if you have enlargement of lymph nodes and you are worried about lymphoma. Work up would be done. A biopsy to th elymph node should be done if the lymph node is significantly enlarged or other things are suspicious. Then you should see a hematologist oncologist and you would discuss in detail about what to do. So, don't lose your sleep for something uncertain yet.