How about a nice gentle ride on a paved trail just for fun and relaxation? You should probably stay off the unpaved stuff and definitely avoid any aggressive position until you get this checked out.
I will join you in your pity party, though, if I may. Just when my injured foot gets better enough to at least do some greenway riding, I get a nasty cold/cough and don't feel well enough to ride.
And the weather is beautiful here too!
Grits
2010 Trek 5.2 Madone WSD, SI Diva Gel Flow
2002 Terry Classic, Terry Liberator