Hello! With what shifts in a cycle can be connected? (me 21 year). Up to a floor...

[Natalia]

Hello! With what shifts in a cycle can be connected? (me 21 year). Till a sexual life the difference sometimes was in some days (a maximum shifts for 5 6 days), but all the same stably to the day did not come. And here after has begun a sexual life (5 months ago) shifts became more. This time after last monthly has passed or has taken place 49 days (!) it is or are protected Patenteksom + a condom.
In advance thanks for the answer.

[Malanova T.B.]

At you, - visible, any hormonal disturbances, you should be surveyed.