Is bloating, frequent urinating signs before your period is here?

Well, I’m not pregnant I’m 13. And I never had sex. But for the past few days, my stomach has gotten twice as big and it’s really bothering me. Also, I had to go pee every 30 minutes like really? I’ve never had these symptoms before, and I’m scared. I’m 98% sure I’m not pregnant. I haven’t had my period yet, it’s about 1 week late. Please help I’m really scared.