I had a bad sinus infection this year too. My face was swollen and I had a clogged ear. I'm over it for the most part now, but it took a long time.

Its funny that you mention taking a university class for fun. When I was in my early 20's I took a creative writing course at the local college. I thought it was fun at the time, but if I took the class today I'd get so much more out of it because of my life experience. In your 20's you're just starting out in life.