I’m worried and a lil upset

I haven’t gotten my period in 450 days. That’s over a year. For the first couple months I just figured it was fine since I’m only 14 and I had only gotten one period before, I know they can be irregular when your young. But know I’m worried. I don’t know if there’s something wrong with me, I don’t know why I haven’t gotten my period in 450 days, but I am very worried. And I know it sounds stupid, but I’m upset too. All my friends have regular periods and I have this weird thing happening. It’s my freshman year in high school I should have a period that’s normal. I’m just willing to do anything. If anyone has tips or advice please tell me.