I think that for me I'm just ruminating on thoughts like what does death 'feel' like, is it going to hurt, what will the process be like etc…
what do others think? does it mean you aren't ready, or is it something everyone feels?
Once you fully comprehend death I don't think there is a way to really get over those bad feelings that the realization produces, besides acceptance. Many philosophers who are 1000x smarter than you and me have either tried and failed or created another framework to cope about the eventuality of death. For me, the more I think about it the worst it gets, so I try not to dabble in this thought too much... When it comes, it comes.
On another note, like many people above said, once you are dead it's pretty much just oblivion which is something that the conscious human mind can't even imagine. If you've ever been under anesthesia you can maybe get a slight understanding of this oblivion... There is quite literally nothing. No concept of space & time, feelings/identity, the universe, or anything in between. When I went under for open heart surgery I was teleported from the operating table to the hospital bed. No idea what happened in between.