No: Plan B should not be taken 2 days in a row. That will not increase its effectiveness but will increase the side effects. If you had unprotected intercourse a second time, you do increase the risk of failure however. Now is the time to look into starting a more reliable method of contraception so you don't have this worry and remember to use condoms to decrease the risk of STDs. Hope this helps.
Answered 10/12/2017
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