I had my period two weeks ago, and i got it again today, is this normal? i've never had an irregular cycle like this.

Maybe: While not usual, it can be a common variant, especially at your age. Call your gynecologist to get some guidance. They may recommend you wait one more cycle, and if things go back to normal, don't worry about it. If you continue to get early periods, they will want to see you to work this up. Don't worry, but call and ask for a recommendation from your doctor.