Depression is very common with TBI/PCS. In addition to Mark's suggestion about having your meds evaluated, talk therapy may be useful. Talk in general is good, as long as the other party in the discussion is aware of your feelings and understands your concerns. Controlled breathing/relaxation my help. Think about the good things in your life (you mentioned your kids) and make a gratitude list. I still get depressed but I found these little things were (and still are) helpful.