 [ Symptoms ] why do i feel tired exhausted and suffering from a headache all the time [ Disease ] by taking the morning after pill you certainly increased your chances of not getting pregnant from this one encounter but this pill is not 100 your biggest mistake was to agree to unprotected sex you are still at risk for contracting a sexually transmitted disease std you will need to wait until your next period is due if you miss your period or have any signs of pregnancy i would suggest that you do a home pregnancy test or see your medical provider unprotected recreational sex has definite risks risks of getting pregnant and risks of an std please do not forget it