What mental illness is this? Illness?

I have been undergoing anxiety and ocd treatment since 3-4 years . I have improved a lot because of medicines and trying to change my thought process . Recently when I got better and my medication stopped . It had been only 3 weeks after stopping the medicine when someone I knew passed away , which made me so sad and my ocd got triggered again . From that day I had to start my treatment again and I feel scared every night . I just don't like the thought of going to sleep , as I feel scared because of no reason . I feel as if something bad will happen . Sometimes I feel some ghost will attack me . This happens only at night . During the day I am happy and calm . Please help . What is going on with me ? Is this part of ocd ? Or some other mental illness ?