Regardless of which neurotransmitters (if any) are out of balance, the solution is going to be at least partially in your nutrition and some exercise. Even if you do decide at some point to take pharmaceuticals, why not support your body and mind the best natural way you can?
Can you go to a pool? Even sitting/upper body stuff will help. It's not just for weight loss or something to do - exercise actually physically changes things in the nervous system.
I did lot of nutrition research. There is lots of info online about it. Food is super important. I also take a mulitvitamin/multi-mimineral supplement and Vitamin D - for me VitD was a game-changer! It changed me dramatically. I used to spend all winter in a listless funk. No more.
