Had my period a day before it was to come i had it on the 13 and it was to come on the 14 i normally vo up to 7 days and i only went for 4 day what cant that be i be hungry allot and be feeling to trow up in the morning and trow the afternoon

Hello Anon

Thank you for writing.

Being a day early isn't significant, nor is a shorter period than normal - four days is certainly a full period. These things can happen out of the blue, due to hormonal changes or a simple change in body chemistry. The menstrual cycle will not be the same from the teen years to menopause. At some stage, changes will happen, as the body evolves with age.
We cannot say what is causing your symptoms but if you are concerned about pregnancy, take a test to rule it out. See your doctor if you don't feel better soon.
Best,
Susan