Take care and remain safe.
Sorry to hear that you have been feeling depressed after you became a non-smoker. Not knowing your background it is difficult to answer your question. Were you depressed when you started smoking? What did smoking accomplish for you? I would suggest go and see a licensed psychologist to explore what is going on in your life that smoking was covering up that now it is manifesting. Keep being a non smoker as it has many health benefits.
Dr. Lata Sonpal