A.,
If you're on medication for depression, it should be working. If it's not, maybe you need to increase your dosage. After losing a late term baby, I took medication (prozac) for depression. I was feeling exactly what you are describing. After only a month, I felt better. At my doctors recommendation, I continued to take it for another month and started having all the pre-med feelings again so I asked my doctor about it and he said I needed to increase my meds. I chose not to increase the meds and stopped taking it. The symptoms went away and I've not had any problem since.
I suppose I just needed them to get through a very rough time. I think anything long term would have made my condition worse, as I had a hard time getting upset or emotional about anything when I was using the medication. I think normal emotions are healthy and I just felt like I wasn't able to feel anything on them.
Another thing, have you had your thyroid checked? If you have low thyroid, this could be contributing to your condition. Low thyroid is often tiimes mistaken for depression. If you haven't already, you may want to see about getting some blood work done to rule it out.
I'm glad you are on top of this. Depression is a serious condition and we need to be the best we can be not only for ourselves, but for our familiy as well.
Godspeed.