Someone please help me

So I’m really scared that I’m pregnant. I’m to young and I have no one to talk to about it . My period is super late and I’ve experiencing symptoms like cramps, constipation, nausea , Fatigue , mood swings , and a runny nose. Then lately i get a feeling in my stomach like a pulse and I learned in school that it can be my aorta but it is so often it can sometimes wake me up and effects me daily. Last night I woke up because it felt like something moved in my stomach, and I currently can’t get a pregnancy test and I have no one to talk to so Please help me Im scared.