Hi Cheryl,
Yep, I have had those same issues. Most recently, I've been coaching 10 yr old boys in a very nosy gym on Saturday mornings. At any one moment, there are 40 plus boys, yelling, and screaming, with bouncing basketballs and adults conversing all at once. The last two Saturdays, I've had to lie down in the afternoon when I get home due to the pounding in my brain! Luckily, I work in a relatively quiet office during the week, but the work is intense. So by Thursday or Friday, I'm tired and the body is starting to drift a bit. As long as I get a good rest during the weekend, I'm usually good to go by Monday morning. So yes, fatigue both physical and mental can add to the impaired balance, at least in my case.
BTW Alicia, you described those electrical zaps perfectly. I thought it was just me. I'll be almost to full sleep in bad at night when I hear an otherwise normal sound in the house, and in the other I'll get that loud "ZZZZZZZTTT!!!" It sounds like the sound my speakers make when I shut down the stereo. Weird things these nerves..............
Steve