I Am A 59yr Old Female. After The Murder Of

I am a 59yr old female. After the murder of my 19yr old son (two decades ago, and is unsolved) and other tragedies I have had PTSD for decades. I also suffer from depression, social anxiety (which creates situations in which I become socially awkward), panic, general anxiety, and nightmares. I have had periods of time that my symptoms allow me to lead a productive life. I have also come to realize that I have probably had mild to moderate bipolar disorder since I was a teenager. Normal antidepressants haven't worked well. I do take 15 mg of Valium daily but it doesn't help depression. Can you suggest a medication that I can discuss with my family Dr. ? I am no longer under the care of a mental health professional bc I had counseling for decades and am pretty good at self analysis and behavior modification. I do need at least a low-dose of medication.