 [ Symptoms ] can you take an antidepressant without being depressed can it cause harm [ Disease ] your fiance is not likely pregnant based on those negative tests but those things can be very frightening a late period can be due to stress it is biologically possible albeit rare to get pregnant if any rogue sperm somehow make it into the vagina at the time your partner is ovulating seminal fluid    the clear fluid that will leak prior to ejaculation and during sexual stimulation    can have viable sperm living in it from a prior ejaculation so it is best not to have this type of genital to genital contact in the future unless you are wearing a condom or if your fiance is not taking any form of birth control