Effectiveness of birth control. - Women's Health - MedHelp

Okay, so I recently started taking the Birth Control, TriNessa, about a week and a half ago. (Taken 11-12 pills.) Last night, me and my boyfriend had protected sex with a condom, then later on, had unprotected sex. Is my Birth Control affective? Is there a chance that I could become pregnant?

Source: http://www.medhelp.org/posts/Womens-Health/Effectiveness-of-birth-control/show/1868772

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