It happens, then one day you feel sorta "OK", you take on a few social activities, and you find yourself doing things you never expected to do before. At least it worked that way with me! I am more social than ever, though people who've known me 40, 50 years might gibe: "Of course, you never were social to start with, so any increase in your social activities is like 100% over before!
Seriously, you sound like you may have a slight flare going on. Have you checked with a Wegener's granulomatosis specialist about these remnants of symptoms or this flare?