Family Planning Plus

Yes, it probably will.

Plan B is not indicated for use prior to planned unprotected sex. Emergency contraception helps prevent pregnancy by delaying ovulation. One dose is only effective for one incident of unprotected intercourse, not for repeated acts of sex. For example, if you had unprotected sex on Monday, then again on Wednesday, the Plan B you took on Monday would not be effective for Wednesday. Plan B is not a long term method of birth control. Taking Plan B frequently could actually increase your risk of pregnancy due to the alteration it causes in your menstrual cycle.

Ideally, you should be using a reliable long term birth control method like birth control pills, patch, ring, DepoProvera injection, etc. When used  correctly, condoms can also be effective at preventing pregnancy.  Family Planning Plus clinics offer gyn exams and birth control at little to no cost, depending on household size & income.