If it was the very first time you ever got a period... I'm guessing you're pretty young. It is normal to have irregular periods in the beginning. Just make sure to keep track of it anyway, even though it's irregular. Then when you see your Dr you can let them know.
Dnt know 4 sure but lf u have had sex maybe u should take a pregnacy test if not then see a doctor.
My period for the first time