I was diagnosed with a pineal cyst in the pineal gland of my brain. Does this cause any symptoms and can it cause you to die or have cancer in the brain?

I randomly have a panic attack one night and had never had that happen to me in my whole entire life. I have always had anxiety, but never panic attacks. I went to the doctor immediately to find out what could have caused all of these feelings that I have that won't go away. I have had this weird dreamy feeling, spaced-out, not feeling all the way there and my anxiety is still pretty bad because I am constantly thinking is something wrong. My doctor did lots of tests on my including an MRI which found the pineal cyst. Could this be the cause of my dreamy feeling? He told me that it has nothing to do with my symptoms, but I beg to differ.