Hi there! I used to be just like you back in 2002 right after my
father passed away. I still battle from panic/anxiety... Its hard to live this way,, but best recommendation is to seek help now, before your mental state gets worse.
best of luck
Are you able to see a therapist?
You need to get to the root of your problem. There is a reason you're fearing death. Is it because you are scared of what might come after, is it because you don't want to leave the people you love, etc. Think about it. Sometimes thinking about things is enough. Therapists try to stimulate your thought process which is the reason for all the hard questions they ask. So you can try it yourself, or if not, see a therapist.