Saying "NO" and Feeling Guilty

I have to say, I accomplished a great feat for me this week. Amongst the chaos of having two kids with Strep throat and the second week in of a Statistics class, I said "no" to something. (and will admit, am feeling really guilty about it). BUT, for the past 7 years at work, I have been the representative within my department to coordinate holiday donations for our local Head Start program. Although, I truly feel that it is a great opportunity to help out other families in our area, it is a lot of work. I spend hours of collecting gifts, buying gifts from money donations, and then having to wrap everything. Whew...with everything else going on in my life, I have declined to participate this year, but did offer up the names of others who may be able to help out this year. Hopefully, someone else will be able to fill in this year. I am just hoping I don't feel guilty for too much longer.