TW: death talk(not suicide or murder)
Hello all, I'm new to this subreddit and im looking for some help or maybe just validation that I am in fact not the only human being feeling this way. I'll start by saying I take 40 mg of Fluoxetine and 20 mg of Vyvanse. I dread talking about this but im hoping that if I get it out I might start feeling better.
  For a while I was doing really really well, I would only really deal with anxiety when I was on my period or experiencing PMS. But for the past couple of weeks I've been feeling.... a thing. I get anxious just thinking about trying to explain it. Its not that gut/chest feeling that anxiety usually gives me. My mind has been plagued with thoughts of how everyone will one day no longer be here. None of us are immortal, none of us are invincible. Every animal, plant and human and even the sun won't exist one day.  Even babies born two minutes ago are already growing older. This past weekend I took a trip with my boyfriend to Philly and on the way back looking at all the cars all i could think about was how none of us will be here one day. My closest loved ones, my fur babies, me. And it gives me this God awful feeling that I simply can't express... I can't pin point where I feel it or articulate just what it feels like. Like, knowing that this WILL happen one day and it's never a matter of if but rather its a matter of when. And there's nothing I can do to stop it, its going to happened and I dont know when. 

I dont know if I should seek therapy or ask my psychiatrist to up my dosage on the fluoxetine. Sonetimes I feel like I'm the only one who experiences these thoughts and feelings but I know thats simply not true.