Hi there- i had unprotected sex today and have already taken levonelle, will this make my period come early as i only finished 7 days ago?

It may: Plan B medication does alter the hormonal balance may cause irregular bleeding once the hormone level goes down. If you miss your period by 4-5 days do a home pregnancy test. If the result is negative repeat the test 4-5 days later unless you get a period by then. Use first morning urine and follow the instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD. Practice safe sex if you have sex. Get HPV vaccine, if you are younger than 27 years.