being tired (all the time)

this week, i went to bed at 8:30 pm (or earlier) 3 times. that is not right!!! i have been really struggling with being tired and trying to get everything done. if i get enough sleep (8-10 hours), i have to go to bed early. i get up at 5 am to work out and then get to work by 7:30 am. i am NOT a morning person. and, if i go to bed at 8 pm, i don't get much done around the house -- laundry, cleaning, etc. plus, if i fall asleep downstairs right after eating dinner, when am i supposed to have quiet time???

this past week, i skipped working out to have quiet time in the morning. i like starting my day in His Word. but i didn't work out at all because i fell asleep so early all this week. last night i got about 12 hours of sleep -- and i already feel like i could use a nap. yikes!

the last time that i was this tired (about 4 years ago), i went to the doctor. she ran a bunch of blood tests and found nothing there. her conclusion was that i was depressed. at that time, it had been a little over a year since my dad had died and the stress and grief may have been catching up with me. even still, i didn't really feel depressed then and i don't now. so, should i go back to the doctor (maybe a different one) and have more blood tests or do i just "tough-it-out"???!!!