Hi,
Generally, psychiatrists are better at managing medications for patients who are suffering with depression issues and if any other mental health issue does come up he or she would be able to recognize it, whereas a general dr does not have that expertise. This forum is a great place to come for support and general advice but I really recommend you also get a therapist to talk to as well. Finding a support group in your area can be of benefit too and in some cases there are both mental health consumer support groups, as well as, family support groups. nami.org is one I am familiar with or dbsalliance
I hope this helps some, best wishes.