It's a possibility she could be. She should take a test to be sure.
I think it's referred to 'breakthrough bleeding' which is a common side effect of taking the Birth Control pill; especially when you first start taking the pill.
You shouldn't do
if your not having your period you probably are pregnant already
Not if you have taken all your pills. You are 99.5% protected from pregnancy when you take BCP.
depends on your birth control, typically 1%
You need birth control so you do not get pregnant also to thin out your period or help with cramps
By taking a birth control pill or being pregnant
If you're pregnant, then you won't get your period
If you are not using birth control and have no period, take a pregnancy test to see if your'e pregnant.
did you wait for your period to come to start your birth control
Birth control is not a 100% way to stop pregnancy and your period makes those chances even worse.