So glad you are still able to take walks, NWG! When I fractured my jaw, I couldn't even take walks for awhile, as it caused the jaw to move about (painful). Once I got it wired shut, I could take short walks, and that was a blessing. I know what you mean about imagining riding on various trails/roads, though; something I always do. I enjoy hiking, but it isn't quite the same as riding, is it?
I also empathize with your not being sure about going out in public. I looked pretty horrific for awhile with my swollen face and then terrible bruising, so I pretty much hid inside our RV for awhile until I looked more human. When my face started looking a little better, I wrapped a scarf around my horribly bruised neck and just went for it. I am sure some people noticed, but ultimately, you have to live your life.
This was me, with most of the worst swelling down (still some remaining), but with horrible bruising that caused lots of nasty colors in my neck a couple of weeks after my crash. Pretty scary, but if I dressed appropriately, it didn't show too terribly much. I also switched to much smaller band-aids for my cuts when we went out in public. I had a stitch under my nose and one on my chin.

I really do feel for you! This is not a fun time, but keep remembering "this too shall pass". It takes awhile, but things will get better. (Me now, for a comparison):
Emily
2011 Jamis Dakar XC "Toto" - Selle Italia Ldy Gel Flow
2007 Trek Pilot 5.0 WSD "Gloria" - Selle Italia Diva Gel Flow
2004 Bike Friday Petite Pocket Crusoe - Selle Italia Diva Gel Flow