Zoloft? Have you considered other methods for treating depression?
Like exercise, organic diet, lots of omega fatty acids, lecithin, B vitamins, mediation, good sex, ending bummer relationships.
You may need minerals to get your hair to grow. From what I understand from what you read you are not loosing hair, it is just not growing. Add silica herbs like butchers broom or horse chestnut. There are some good formulas out there but make sure they have one or the other of these herbs.