Hi Medicated - I really can relate. I am trying to hold down a job, and often go thro days like you describe. I actually have a lot to do, but come the end, I've nothing. I've just been on the internet (mostly PC) or chatting to mates via e-mail. I withdraw and sit in my corner, hoping to avoid anyone seeing me.
I have a To-Do list, and use my calendar on my computer quite extensively - I let reminders pop up ever 1/2 hour or so, to tell me what needs to be done. I then need to prioritise which are NEED to do NOW, vs NEED to do SOMETIME. When I have the energy and motivation, I try work through this TO DO list as much as possible.
I am also battling to find the correct medication. I feel my anti-depresssants aren't working and my mood stabilisers are only helping to prolong my cycles, not make them any less intense. Friday I was so depressed that ODing became an option. But I felt guilty, which I guess is good. I wanted to go to hospital, but I felt guilty about that too. I have now addressed a few issues I felt are impacting negatively on my life, and need to put myself as number 1 again
You need to put yourself first. My biggest issue is having no time to myself at any stage of the day - I need to get to know what makes me tick and focus on that. Don't bend on any boundaries you have set to make you happy.