I agree with everyone else just drink plenty of water and rest as much as you can.
You are not letting anyone down by looking after yourself and resting.
I have definitely lost my motivation to do anything, it all seems too hard at times but then again it doesn't last too long as I have 5 other children to look after so I don't have a choice. If this was my first baby and I didn't have anyone else to look after I would rest as much as possible and take advantage of the time I had to myself.

When you feel better and less tired then you will feel more motivated and will want to do things.I am sure that won't be too far away but until then rest up and look after yourself.
Take care
Michelle