My clitoral hood has been swollen for over a month. What is this and what can I do?

I think what you have is Vulvodynia. In layman's terms, it's "pussy pain." I've written an article about this condition after I heard the podcast from Dr. Kat. She's a clinical sexologist. There are ways to cure it, but they were discussing very briefly about the last option which is the surgery. The link in the source.