Heavier flow on BC pill :-(

I just finished my second cycle on the pill. My period is heavier than it was before. I used to be able to wear a pad for 4 hours, but now I soak through one in less than 2 hours, and a tampon in 1 hour. I've already had 2 leaks in one day :-( I've also noticed the blood is darker and thicker than it was before the pill. Is all of this normal?