What happens if you take plan b 2 soon i.e., before you need to. i have a 35 day cycle and took it on day 10 (the day i had unprotected sex) which is 11 days before my projected ovulation date (e.g., day 21). did i need to take the plan b 2 begin w/?

Plan B ?'s: Taking "Plan B" eleven days before ovulation will not provide adequate (dependable) contraception . If your period does not occur when expected, wait another 7 days and obtain a serum HCG test to be certain about possible pregnancy.

Plan B issues.: Plan B works mainly to supress ovulation, though it may interfere with implantation. . If you are using it as " on demand" contraception, consider the new non hormonal vaginal gel, Phexxi. It works by lowering the ph to make the environment inhospitable to sperm. It needs to be placed prior to sex and is 90% efficacious.