BF thinks I'm pregnant

So, basically, my boyfriend thinks I'm pregnant because I haven't started my period this month and I'm about a week late. He says he never came in me but you never know. He's scared for me to take a test because we don't know what our parents would say or do because of how old we are (16 and almost 18). So is there another way to tell if you're pregnant besides taking a test? Like and symptoms?