terrified of other people

hi.I'm a guy and 17.5 years old
i need some help. my problem is i am terrified of other men.
for example I'm walking a down a street and see a man coming towards me i feel like he's gonna mug or he's glaring at me.when i'm at park jogging if i hear someone laugh i feel he's laughing at me.i can't shake this feeling that the whole world is attacking me and when i go out or talk to someone new I feel like I'm in a defensive position like i'm attacked.
i dunno why I'm terrified of others like they wanna attack me or make fun of me or why i feel embarrassed while I'm jogging and scared if someone notices me.can you help me?