I have been diagnosed with mild depression and have been prescribed a low dosage of prozac. My symptoms are not feeling sad, angry, etc but more tired, sluggish, lack of motivation, etc. I have read online that taking B12 could help. Is this something I should do? If so, what kind do I take? I have looked online and there are so many. It looks like some have b-6 and folic acid as well. Thanks in advance for your help.