Hi @smoothiesuzy, I would like to add my welcome to Connect along with @hopeful33250 and others. Your description certainly sounds like low blood sugar even though it's not the case. Do you think it could be stress related? Sounds like you already have all the bases covered mentioned in this article.
I have no medical training or background but I do agree with Teresa that it may be a good idea to check with a sleep specialist just to rule out sleep apnea. I'm hoping others may have some better suggestions.