Unpopulated Fields in a Form based on Pivot tables

I use Pivot tables to view sales by month Jan-Dec, but can't seem to find a
way for the form (or report) to automaticaly deal with the fact that in
February there are no pivot table fields for the months March through
December. Each month I have to manualy go through various forms and reports
adding the new field for that month, or I create all the fields ahead of time
and set the fonts to white so they don't show the error condition. Surely
there is a better way to deal with this and I have just not found it.

Any help would be appreaciated.

Thanks,
John Pierce