I think i’m pregnant

Okay so this app usually tells me when i’m supposed to start my period and I usually start a couple days before the predicted time. But today is my predicted start day and I have morning sickness and I’m really thinking i’m pregnant . I’ve had major fatigue the last few days and my breasts are really sore and tender. The bad thing is, i’m 15 and i’m really stressed out about it. I’m just hoping I get my period today or in the next couple days