Another thing you could try, if you still have teeth intact, is my
Dentist suggested 'for kids' (whose jaws grow rapidly), that Sports
supply stores sell plastic tooth guards for Soccer and Hockey.  He said
to cut the plastic guard in half horizontally as you *only need protect
the Top teeth, to prevent tongue or tooth damage.   It might take a few
nights to get used to the appliance if you try it.(That's about $40.
for 2, as each half could be used over top teeth.)
  The version I use (Dentist above) is called an Occlusal Splint and
your Dentist could give you an estimate for what it would cost for
fitting and lab fees.  I have a Dental Insurance plan that paid for all
of first one, and 80% of second one (4 years later).  They take an
impression of upper and lower, then lab (highest part of cost) makes a
plaster caste from that, and a clear soft plastic semicircle that fits
more snuggly over the top teeth.
  It's about as thick as a coin, and soft plastic, so easier to get
used to-- reduces risk of tooth grinding, or tongue damage if you were
prone to nocturnal seizures.  After above impression, new splints can
be made if needed for about $40.? Canadian, for about 3 years before
new impressions are usually needed.
 Original impressions, lab fees, and first splint (at top) were about
$200.-250.   Your Dentist could give you an estimate of current costs,
if you're having a lot of nocturnal events.   It provides Excellent
comfort for a full night's sleep, as in some cases we might be half
waking up, repeatedly, and that could contribute to being more tired
progressively after several nights like that. The extra lack of sleep
can also lower our seizure threshold, so make daytime seizures more a
risk if we are sensitive to that.  (I was at the time.)    G./