What are the likelihood of getting pregnant using birth control pills correctly?

I already have children and I do not want any more!! I've be using the bc pills correctly for almost one year.
Answers:

Heavy period and 4-5 hour trialling, what do i do..?

Birth control pills - under PERFECT usage (taking them EXACTLY as described in the leaflets and NEVER missing, and using backup BC for any uncertainty) hold a 0.1% to 0.5% failure rate (or 1 to 5 unplanned pregnancies for every 1000 users every year).

In veracity however, the pill is about 95% successful (or 5 pregnancies per 100 users per year). This includes taking the pill at different times, missing one or more pills during your cycle, not using backup contraceptive during the misses or during antibiotic use, and drug interactions.

Personally, I've been using the pill for over 15 years and enjoy NEVER had a single pregnancy upset. It's all contained by HOW you use it and how diligent you are in your personal charge.

Should I start shaving?

If you use them 100% correctly you probably only hold a 1 % chance contained by getting pregnant.

Birthcontrol question?

the simply 100% affective b/c is abstinence next to pills about 98% effectual