Severe Anxiety about flying from Denver to Hawaii alone.. HELP!

Has anyone flown from Denver to Hawaii who has advice?! 😭 I am flying from Denver to Hawaii next Saturday (less than a week away) and I have spent most of the last two days convincing myself that I need to back out. I am TERRIFIED of flying over the ocean for 6 hours straight alone. Even worse, on my way back to Denver from Hawaii, it’s a red eye flight so I will be flying over the ocean for 6 hours in the pitch black… alone. I have flown a bunch of times within the United States and I typically have very mild anxiety. But this is different as it’s my first flight alone, my first flight flying over the ocean, and my first time taking a red eye. The open ocean is one of my worst fears and I don’t know if the 14 total hours of flying with anxiety and panic will be worth it for the 5 days that I’m there. I do have anxiety medications that I’m prescribed for severe situations/panic attacks. Any tips or advice?!?