Is it even possible to decline my work's baby shower?

November 15 |
@offbeatfamilies runs these advice questions as an opportunity for our readers to share personal experiences and anecdotes. Readers are responsible for doing their own research before following any advice given here... or anywhere else on the web, for that matter.
Photo by Sugar Daze, used under Creative Commons license.
I am pregnant and I experienced raging morning sickness that more closely resembled all-day sickness. I threw up at work several times (in the bathroom) but was still "reminded" by Human Resources to use the bathroom for all incidences because they had "received complaints." I was embarrassed — I did all I could have.

I work in a small corporate office and we celebrate birthdays and things, including baby showers. I don't want a baby shower thrown for me for the sake of being consistent by my co-workers who complained about me, and my family and friends are both planning two already — this would be a bit superfluous.

Should I, can I, decline a baby shower from my co-workers? Is there a "good" way to even do this? — Claire