Is it bad that theres a lump under the skin in front of my ear and my ear does not drain everytime i have an ear infection and could the drainage problem be causing the lump?

I currently have a hard lump in front of my ear - has been there for a few months. i did not know that I had fluid in my ears but at the drs when I was having the lump examined - she found the fluid. I am on antibiotics right now to treat my ears. The thought my dr has is that the ear infection caused my glands to swell. If the lump does not go away after 10 days of antibiotics - I am having an ultra sound done. My lump does not hurt - but something is causing me to have a head ache ALL day long :(