Well, try and be positive and focus on the fact that today you feel better.

Set up a to-do list for today to keep yourself busy. Do things for yourself; things you enjoy. Then tonight you can get back into bed, relax, and once you wake up tomorrow morning you will feel even better.
These are just cycles you need to accept as part of who you are. You need to ride them out and learn to understand them. I'm sure that with the help of a T you could work on coping mechanisms for when you are feeling down. And speak to you p-doc about your meds. If you do not feel a change on the meds, you need to tell your doc and try something until you find the combination right for you.