Home Vitamin Treatments For Depression, Anxiety, Lack Of Motivation, Lack Of Energy?

Slowly but surely over the last few months I have been falling deeper and deeper into this whole. I am sad all the time, depressed feeling. no energy or really motivation to do anything. I have all this stuff i want to get done and participate in but cant be cause I dont feel like EVER doing ANYTHING its really affecting who I am.
I need to find vitamins for energy, and one for motivation also.
what do i use for the depression. I know of st johns wort but dont notice anything w/ that..mayb i am not taking enough.
what else do you recommend??