Hi Lisa,
Not going to be much direct help, but if you have been focusing on particular names/lines. you might want to check out the 'ANCESTRAL TREES' tool on the DNA Painter site. You can enter a basic tree, but then start flaging people that you have DNA matches to confirm. the Fan chart then gives you options to visualize which lines you have no matches on so far, or have not focused on so prehaps need to look at :-)
Richard