Period On BC

Calin • Sometimes I do stuff
So I first started BC on Jan 19th and I'm very good about taking it. I always take it on time, never missed a pill, etc. At the end of my pack about 3 days before my period week I got my period. It's now the first day of my period week and I guess I'm just wondering will my period be longer because I am on my period week? I don't want to be on my period for Valentine's Day and me and my SOs anniversary 😁