i've got the strangest feeling...

(i swear i'll post better blogs in the future...) i've been thinking about my grandpa alot lately, he's been talking alot about how old he was and that he was bound to kick the bucket anytime soon, recently he passed out and wound up in the hospital, lately i've been having these thoughts and things about my grandpa dying, it's a terrible feeling, what's even scarier is that i had similar feelings right before my cat died. what should i do?