Hello, I am a 44 year old male with a history of severe depression, anxiety and PTSD. Recently, I have had severe headaches, insomnia, a dead sex drive and my blood pressure has gone very high. One thing that changed was my psychiatrist switched my anti-depressant from Prozac to Viibryd. Also around the same time I experienced a couple of very stressful events - so It is hard to tell which variable may have triggered these awful symptoms. What is your professional opinion?