That sounds awful!...Sorry to hear that...
Are you able to keep any food down? I certainly hope you are staying hydrated with water, postassium, and a bit of salt...
And you are sleeping from what time do you go to bed? If it's in the evening...you are saying you sleep close to 24 hours?
This is emergent in that I would call the on call Dr. and even say you want to go to the ER...
You could be having too much medication getting into your system...Some fatigue is normal but a week of such extreme drowsiness and fatigue could be very serious...
Also..being dehydrated can be life threatening if you are not replenishing fluids...People can last without food for days...but not appropriate liquids..
That is why if it's as serious as you say...I would be going to the ER and letting them know...
Keep us posted..