It depends on the particular brand of BCP's, the hormones in some if not started in the days after your period starts will cause bleeding or heavy spotting. Others don't have that effect. But 3 weeks early (21 days) should be right in the time for starting BC, in the week after you start your period. So 3 weeks early from what, is the problem with giving a more definitive answer.
Yes. The first month or two after you start birth control your period will be somewhat irregular.
no this is NOT normal, maybe you have forgotten the pill or miscalculated.
It will stop ovulation & prevent pregnancy when you've been taking it for 4 weeks.
I don't think that should be happening, I suggest you go back to the doctor or clinic.
There's no benefit from taking birth control when you're 21 weeks pregnant.
you should talk to your health care practitioner.
You can actually be put on birth control about 6 weeks after you have your baby.
I suppose it's possible. Anytime you start a new birth control you should always use a "backup method" of birth control to be safe. Take a home test and if it comes back negative but you still haven't started your period, then consider making an appointment with your ob/gyn for a blood test.
u will most likely to get your period while on the patch which is not good for u.
yes there was someone who was 4 months early
The early period may of been brea through bleeding or possibly even a withdrawal bleed. If you suspect pregnancy then perform a HPT in 2-3 weeks.
If you've been on birth control for over 4 weeks then you're protected against pregnancy.