usually on birth control you have a very light period but until your body gets used ti the birth control then you can have anywhere from a normal flow to a very light flow.
Yes, they can. If you are experiencing this you should talk to your doctor, nurse or gynaecologist about it and they can help you find a birth control pill that works for you without making you feel...
This is not exactly normal but it does sometimes occur when you first start BCP. Because of this I wouldn't worry too much but if the same thing happens next month then see your Doctor.