This is my first time using birth control and my doctor said to do a day one start and start with the white pills the first day of my period. I am taking them like clock work every morning at 8. My period lasted 3 days and was very light with no cramps. The following days I saw no blood. Now on pills day 7,8,9, and 10 I'm having slight cramps and I'm seeing a little bit of dark thick blood with a couple spots of bright red in it. Is this normal for someone just starting on the pill?