Dear friend, welcome to HCM.
was a CT scan
head done then?
if there was one, and had no bleed , you could take rest, not drive or go to work for few days till it resolves.
your symptoms indicate some brain trauma
. sometimes late bleeds can occur.
can take simple pain killers like acetaminophen
, till then.
if you feel worsening , voimitting etc. pl. see your ER doc again.
driving would be dangerous till you settle. do not drive till certified OK.
take care and keep me posted on your progress.