Beau, you have consulted your doctor who says there is nothing wrong, but has made no helpful suggestions about getting over your tiredness, as far as I can see.
So either you plague the doctor until she or he comes up with something that helps, or you accept that there is no physical cause for this tiredness.
Which leads me to ask, could there be an emotional cause?
Do you, like me, enjoy housework? It is usually the things we don't like doing that make us tired.
Are you worried about anything? Feeling lonely. Bored? Is there something you feel or know you should be doing that you don't want to do?
The answers to these questions are, of course, not my business, but I would like to suggest that you ask yourself them seriously and answer them - if not at once, after careful thought.
You see, feeling tired is an acceptable reason to shove worries to the back of your mind, and an even better reason for not doing a whole host of other things.
However, my experience has always been that I go on feeling tired until I have confronted the issue that is bothering me and either solved it or started taking steps to solve it.
A lot of people find sleeping from 10.30 to 7.30 normal, so why are you asking about it? Did you use to stay up much later or get up earlier?
I never go to bed at 10.30, so I am not the right person to ask about this, but I have sometimes felt, "Oh, dear, will this day never end, so I can go to bed?" if something has upset me.
So please consider whether you tiredness could be caused by something other than a physical cause.
I hope you manage to defeat the tiredness and enjoy life again, because it sounds to me as if you aren't really enjoying yourself right now.