It’s been going on for about three weeks at this point. I’m not a smoker and I haven’t lost balance or coordination, though my one foot feels sore due to a more than likely unrelated cause. I also haven’t had any headaches, though I will admit that I’ve been feeling tightness in my wrist, arm, and shoulder as well as occasional twitching, but it doesn’t seem to be getting worse so far other than a general feeling of weakness and heaviness.