Anxiety disorder?

First of all hello,

For about two months now, I've suddenly been afraid of everything, like that my parents aren't well (even though they always assure me they're fine) or that something will happen to them. Not only that something will happen to my parents, but I hardly dare go out. If someone even walks past me, I panic because I think they're going to hurt me.
When I was younger (I'm 17 now), my mother was in a psychiatric hospital for two years due to depression. Could that be the cause of my fear of loss? I cry every night for no specific reason. I just can't go out anymore without panicking. I can't really describe it, but I hope you understand me somehow and can help me.