Late again😬

My period is 15 days late and I’m wondering wtf, I was on depo at 16 and got off at 18 in January 2018 was my last depo shot and I didn’t have a period the whole time and I am now 19 scared I can’t have kids🤷🏾‍♀️ and wondering if I’m pregnant this time but every time I wonder it’s negative 🙄 but this time I’m hungrier and my stomach is always hurting and sometimes feel like I’m going to throw up but don’t 😑 HELP!!