Death anxiety

Zoe
So I posted a similar thing about this a couple of months ago and it seemed like the reassurance at the time helped but now its gotten worse. I've never been an anxious or nervous person and am confident in the majority of aspects of my life yet this really lets me down. Speaking, thinking or acknowledging death sends me into a full on panic attack. The conversation doesn't even have to be deep into the topic, you could just browse quickly over it and  if death or  something related comes up its an instant crisis for me. even hearing about it on the news makes me desperatley nervous to the point of on the spot breakdown no matter where I am. When I think about death, the certainty of it makes it feel as though life is like a cage, and no matter what I do to make my life as unique to me as possible it will result in a waste as we practically live to die. 
Ive pretty much lived with this feeling all my life and I just feel as though its normal to freak out a little over death but not to the extent that I do. Can anyone offer any advice on how I can possibly end or control my emotions and break downs regarding death and has anyone else had any similar experiences?