Bethany,
I remembered another mom having this issue, so I looked it up - here is the link:
http://www.mamasource.com/request/7875854596667604993
You might find some helpful advice there. Also, I just want to say I think this is pretty normal at this age, and I'm not sure it's always related to lack of attention. I think girls at this age/stage are beginning to approach puberty - they're not there yet, but getting closer - and they don't always know what to do with themselves. And they really may have some vague aches and pains, etc. Or they are just anxious and don't know how else to express it. I think the best approach is to stay positive and unemotional yourself; be proactive - be ready beforehand to think of things to engage her in and ways to show her attention or give her praise; and last, just listen, express your sympathy and love, give her a big hug, and then get her to help you with something (changing diapers, setting the table, etc). Good luck and don't be too hard on yourself! This may be a stretch, but you might consider finding some "postive affirmations/positive thinking" CD's and let her go to sleep at night listening to them. It could really help her to end her conscious stage hearing positive statements, and it could re-direct her subconscious mind to become more positive. One last thought is to help her make a "journal of gratitude" where she lists a couple of things every day that she is thankful for...maybe that could help train her to look more on the positive side and recognize the good things in her life.