OH My - I'm so tired - Is this normal?

I am in month # 7 29th week -
This week I have been so tired. I think even more tired then in the first trimester - I am just curious - did anyone else feel like this?
I have planned on working up until the day I deliver if I could - but with the way I have been feeling this week - I don't know - I'm finding it hard to work b/c I can hardly keep my eyes open - Can it just be a bad week or will this how the next two months will be?

maybe its just a busy week. maybe youve been doing more than you should, the nesting phase !
Are you organizing and cleaning at home for the baby ? Are you working longer at work ?
It wont be this bad the whole time ! Go to bed early tonite !

HUGS TO YOU !