Do not be afraid of feeling depressed and without energy or willpower. This is very normal and it is ok to feel this way. However, the fact that you are already taking medication shows that you do not intend to spend your life feeling miserable and powerless.
Therefore, I ,and so many others on this board, are trying psychotherapy, and finding that it actually works.
It is a very gradual improvement but it is surefooted and lasting. By talking to a professinal who can steer you the right way, you can discover things for yourself that you didn't even suspect existed and you will slowly come to understand why you feel the way you do and what you CAN DO ABOUT IT.
Please do not despair.
Have a go and see what you think. This trip to self discovery and freedom is a very exciting one, I tell you!!!
God bless you