When someone dies you don't get anxiety, you suffer from grief and perhaps a fear of your own mortality. This is what happens to everyone. When it sticks around for a long time and affects the way you think about everything, as it seems to be doing, it's time to talk to a professional about it so you can get past it. There's no sense in being afraid of getting any severe illness, whether it's schizophrenia or any other illness. At some point in your life, most likely when you are old, something will happen. But there's no way to predict what will happen. Just because a family member has something or might have had something doesn't mean you will get it -- even people with genetic predispositions aren't guaranteed to get something, it raises the probability and indicates steps to take to prevent it if such steps exist. With schizophrenia they really don't, so worrying about it is useless. What's happening to you is you're just plain worrying about things because you've gotten insecure about life and you have unresolved grief. So again, it might be time to talk to someone who can help you regain your innate sense of balance before you talk yourself into a chronic problem. You're very young -- and thus very resilient, even if you don't notice that part of you.