Do you ever feel like you’re dying?

Hey guys so I’m new here and just recently started struggling with some health ocd and thinking I had a brain tumor but it’s taken a turn for the worse and become this existential ocd where I’m questioning quite literally everything in my life, the purpose of being here and stuff. I just started meds yesterday, which is scary for me cause I’ve never been on them before. I keep having thoughts like, why does everything feel like a blur, what’s the meaning of this and I wake up every day with just existential dread. I’ve been having very vivid dreams that make dreaming and reality confusing I also am scared cause I’m dealing with some DP/DR as well. I just wish my life could go back to a few months ago before I knew all of this was possible. I guess I’m just writing this too get it off my chest and see if any of you all have gone through something similar and made it out okay?

I feel like every person I see who has recovered from OCD doesn't have my theme. I feel like I woke up in a nightmare I can't escape and it'll never end. Do people actually get better from this?

My OCD has bounced around to a lot of different topics but my current spiral has been focused on existential dread - I have a lot of intrusive thoughts about my loved ones dying and not existing and about my own death and not existing anymore. OCD is trying to get me to find certainty in what happens after we die… and unfortunately I will NEVER be able to find certainty around this. This spiral started after the death of my beloved cat and then the almost death of my dog a week later. I think OCD attached to this idea that everyone and everything I love is going to die and I need to prepare myself for it and somehow KNOW what happens when someone dies. It’s panic inducing and really hard for me to sit with vs other OCD themes Ive had related to health, moral/hyper responsibility, etc. Anyone have this type of obsession around death of loved ones and how did you combat the intrusive thoughts and deal with the mental compulsions (rumination, avoidance, etc)?