You could get side effects for about 3 months. Your body just needs time to adjust. If they persist after that, you made need to switch your brands of birth control.
There are no known effects, short- or long-term, of birth control on bladder function.
While on birth control, your periods should last just as long as when you're not on birth control. Some women regularly experience 2-3 day periods while other women can regularly experience 6-8 day periods.
A child who takes three birth control pills may have some nausea, but no other short-term or long-term ill effects.
As long as you don't smoke there should be no harmful effects to your health
Your period will last between 2-7 days.
You can stay on birth control your whole life without adverse effects appearing. But medicine reacts different for different people. Someone might be on it a month and have an adverse effect to it, it all depends on the person.
It usually lasts about 2-7 days less
It should be the same amount of time as when NOT on birth control.
When you take birth control pills, you will have your period arriving during the 7 days break. During this time your period may last between 2-7 days.
how long does it take to get back on your normal cycle after stopping birth control
It depends on the type of birth control. Sometimes after starting it, it could be longer than normal, and sometimes it will disappear the first month. Sometimes it will be normal, and sometimes is will be shorter.