Has anyne ever taken Yasmin, if so how does effect your period because it has made mine stay on longer?

I just had a baby in January but i took Yasmin before i fell pregnant and I just started it again in February. Yasmin has made my periods shorter. I used to get my periods before pregnancy for 8-9 days on a long stretch and it reduced it down to 5. Now after having a baby its done the same thing once again....yet my body is still slightly psychotic. Its helped me heaps. But it may work differently with other women.