 [ Symptoms ] what is the dosage for cipro when treating a uti and pyelonephritis and for how long [ Disease ] if the first time that you had sex was unprotected it is always possible to get pregnant even if you did have a normal period a few days after your sexual debut yes stress can adversely affect your menses but again so can pregnancy so you should be taking a home pregnancy test or going to see your medical provider to be examined and have a more sensitive pregnancy blood test