Unpleasant side effects of meditation

I am 45 years old. I’ve come to realize that I have been more or less unhappy in my life. So I met a clinical psychologist and I do show some childhood codependency issues and we could no CBT and *anapanasati* for 10in a day to get rid of my anxiety. Contrary to all our expectations a day or so after meditation, noticing the breath at nostrils, I become into a very strange mood, low energy, edgy, sad and rarely aggressive. After few days I started having panic attacks and I was asked to stop and do simple relaxation. But my concern is why is this practise giving me such negative side effects? While others enjoy calm and peace. My psychologist was of the view that it might be the traumatic childhood I underwent with my father. Which was 40 years ago. Also, I had very painful dreams of my childhood during this time. Also, loss of appetite, tension headaches and loss of taste. Does anyone had any idea why I’m getting this unwelcomed side effect? Will it stop at some point or should I give up? Kindly share your experiences.