My last few jobs made it very clear that my absence was, essentially, unacceptable. WaMu had a rather strict attendance policy, which was part of the reason why I left, actually (I had a hard time getting them to give me an accommodation for the debilitating headaches I was trying to deal with at the time). For SMART, I was THE coordinator for my school. If I had to call out sick, I had to find someone to cover for me, or else the kids wouldn't read that day. Reed library only had two people working at the desk at any given time (usually), and working the desk alone was not a good thing. It goes from there.
So, I tend to feel rather guilty whenever I have to call out sick. I always felt like I could push myself to go to work - it's not exactly like I have a difficult job. I know that if I push myself, I can go into work, and make myself sicker for even longer. I know that staying home and resting will help me feel better more quickly. I still end up feeling guilty as all hell, though - I keep thinking that I'm letting someone down, somehow.
Well, considering it took me twenty minutes to write this because I kept having to stop to blow my nose or sneeze, I think I made the right call in staying home today. I'm going to meld with the couch, now.