Am i Overreacting?

I'm 15 years old, so I think it's normal, but I wanna make sure. For like two months I didn't get my period I was scared and thought I was pregnant, but then I remember I'm a virgin lol. The reason I was scared because I never had an irregular period before. I also never skipped a period. On Monday, I finally got my period. I was relieved and somewhat happy, but then my period stopped on Tuesday! I'm confused because this never happened to me. I just wanted to make sure that this is perfectly normal, or am I overreacting like the dramatic person I am? 😂