Hi Feary,
can you write down everything you're terrified and worried about. Then make 2 columns: 1. things you have control over. 2. things you don't. When did all of this start? Are you eating healthy? All we can do is change the things we have control over and accept the ones we can't. Would it help if you accept the fear, accept you won't be young forever, and one day we'll all die? I hope the medication helps.