I'm in training for the Portland Marathon and things are looking great so far. I'm progressing much better this year than when training for the Seattle Marathon last year.

Now to the point. Last week was my long week of 50 miles, which consisted of the following:
Mon: Bike 60minutes (on the trainer - new bike is in the mail)
Tues: Run Easy 5miles
Wed: Run Medium 10miles
Thurs: Run Easy 5miles
Fri: Rest
Sat: Run Negative Split 10miles
Sun: Run Marathon Pace +:30-1:30/mi 20miles

I felt extremely tired, but good after last week. As this week progresses though I am feeling more and more tired. I increased my caloric intake to avoid starving myself during the latter part of last week and through the early part of this week. I even had Mexican Food with lots of tortilla chips and then Ben & Jerry's as a "present" to myself. I've returned to my normal training diet, but this week I'm still feeling completely fried. I was hoping I'd be starting to feel better 3-4 days after my long week.

This weeks plan:
Mon: Bike 60minutes (on the trainer - new bike is in the mail)
Tues: Run Easy 5miles
Wed: Run Easy/Medium 6miles
Thurs: Run Moderate 5miles
Fri: Rest
Sat: Run Moderate 6miles
Sun: Run Marathon Pace +1:00-1:30/mi 12miles

Is this normal? Is there anything I can do to help? I've tried to get the same amount of sleep and even slept in this morning an hour or two to get more "rest." Or do I just need to let the week take it's course?

Thanks