This is Dr. David
I am sorry about your husband.
he could be having a bacterial or viral infection
or a seizure or low blood sugar levels.
you should bring him to the hospital to have blood testing to check for infection.
you can take his temperature as well
but even if he doesn't have a fever, he needs to see a doctor right away.
and get testing to find out what is going on.
do you have a hospital or A&E clinic close to you where he can be seen right away?