Long term use of clonazepam. Answers!

Hello, I have taken half nexito plus tablet for almost 12 years . My biggest mistake is to continue medicine without doctor's prescription after initial year. Now when i stoped medicine with doctors direction, my depression came back after 6 months of stopping medicine. I am taking couple of medicines now and main drug sertalin 100 mg 2 times. As sertalin helped me in first few weeks. But later i am facing complete emotional blunting , lower concentration , attention, focus. Continuous headaches, anxiety attacks , imbalance issue. I have read multiple articles on benzo use for long term and it says that long term use of benzos can cause permanent changes in brain or treatment resistant depression. I am too much worried now. Can someone tell me that my symptoms are due to clonazepam use for several years or its because of depression. Awaiting for answers