Hello, I also experienced similiar 'epic' dreaming.

For context:
I'm a 25 year-old (m) who began experiencing these 'epic' dreams which leave me completely exhausted and on edge every day. It began 8 years ago when preparing for a medical university entrance exam. I pushed myself despite feelings of fogginess, racing thoughts and pain in my body on questions I knew I found overwhelming to bear focus on whilst being time pressured due to the nature of the exam. All of a sudden one night my brain couldn't shut down when resting and it felt like it was constantly 'on' and racing with thoughts like when I was studying. I knew then and there something horrible has happened and I felt my brain has shifted into a state of chronic stress. Since that moment, I began having intense vivid dreams paired with a chronic stress response anytime I try to focus/concentrate. I've tried numerous therapies EMDR, EFT, CBT, acupuncture, etc. but my dreams remain as well my stress response to focusing. I haven't been able to resume my studies or work since as my energy levels makes it not possible for me.

This year, I saw a psychiatrist specialising in sleep issues this year. He said this phenomenon of chronic intense 'vivid' dreaming isn't well researched unfortunately. I have already tried numerous anti-anxiety and anti-depressive meds. Based off the medications I have yet to try, he recommended trying first pregabalin. Then if that doesn't work daridorexant -> trazadone -> agomelatine. I mentioned to him about prazosin but he said that this is meant to treat nightmares which I suppose I don't have since I'm not getting scared in the dreams, but I do find them intense as there is a lot of going on and I'm constantly monitoring my behaviour so I'm not being perceived negatively be others. I'm considering to start prazosin as I used AI and it mentions that prazosin reduces the noradrenergic (fight or flight) activity during rest.