nervous to test

I've always been nervous like everyone else about testing because of the possibility of a negative result but this month I feel like I am pregnant I feel nauseous, slight cramping, super tired that I take naps (never do that), and have to pee more then usual in my opinion. But I am suppose to test today 12dpo Christmas eve and I'm terrified I'm so scared wat if it's all in my head wat if it says negative wat if I wake up tomorrow and af is here gosh I'm so scared but we wanted to test today so we can tell our parents on Christmas Day. Ugh any ideas?