Should i Worry?

If they are taken correctly (taken the same time every day), the chance of becoming pregnant is less than 1 out of 100 women. So, percentage wise - less than 1%.

If it is NOT take correctly, the chances could increase to 8%.

Check out the link from Planned Parenthood for more information:
http://www.plannedparenthood.org/health-topics/birth-control/birth-control-pill-4228.htm#effective