Who doesn't understand you? The Dr's or the people here on this board. I can guarantee you that both groups understand you.
We know all too well how the fear nags at you. That's why we're urging you to get treatment for it. You're in classic "the Dr's won't listen, nobody understands me, I know all the tests were wrong, I just know I'm dying and they're all wrong" mode. BUT the Dr's are listening, we do understand you, the tests are NOT wrong, and you're NOT dying.
YOU DO NOT HAVE LYMPHOMA. You have anxiety.