had the newsletter been sent out before without a problem or would that have been your first one? It appears that there had been a glitch (at least for my January newsletter which went out before Christmas). The one for February was sent February 2. Have you checked all the settings and made sure that you yourself are on the recipient list?
I believe that the newsletter cannot be shared through Facebook but the articles on FitFeed can. When you run the cursor over the ‘Share’ display, it provides several options for forwarding.