It does sound as though Geodon is the culprit but I'm not sure what can be done about it other than giving it more time for you to adjust to it. Sometimes side effects ease with time. Talk to your pdoc and see what they have to say.

For me, as a rule I try to eat no less than 4 hours before I go to bed because I believe that with less food in my stomach at the time I go to bed, the faster my sleep aid works. Also, in general, sleeping on a full stomach just gives me indigestion and interferes with my sleep.