Im 22 Years Old Married Ive Always Had Irregular Periods.

im 22 years old married ive always had irregular periods. i get my periods after every 2-3months and they come there normal 5-6days but this time its been over 2weeks and im scard i dont no what that means . i had a baby last year with a c-section ! I duno if it something to with that? Ive done lots of tests done for irregular periods but everything came back normal . periods are very light i have no pain at all but they wont stop !