1 week late period after taking emergency pill

Hi all, i'm a very scared boyfriend (i'm 25). This is about my girlfriend (she's 24)  who should have been having her periods by now but still hasn't. Her period started on 17th of june, we had sex on 19th/20th of june. Within 24 hours she had the emergency pill. I usually dont ejaculate inside her, we usually use the pull out method. I know its not 100% safe but trust me, i'm a guy. I dont lie when i say i dont usually *** inside her. I know we were in the 'safe' period, on top of that she had the pill. But for some reason her period still hasnt started. Its 24th july now. She had a test couple of days back but it came negative. Nor has she the signs like sore breasts, nausea etc etc. Please advice me anyone, as i'm freaking out here. Thankyou.

[Nina159]

The pill can mess up her periods

[encee1126]

Yeah I've taken the morning after pill years ago and it does mess up your cycle. Could b early could b late. For me it made it come two weeks early

[Clysta]

Plan B is well known to cause messed up cycles. However you both are playing with fire, and unless you're ok with her possibly becoming pregnant you need to use protection. You DO NOT have to ejaculate in a female to get her pregnant. Pre-ejaculation is present when a male is aroused, isn't felt and does contain sperm. Unless she does OPK's, BBT, and/or sees a doctor to know when she's ovulating, there is no such thing as 'safe time' as without these it's impossible to gauge exactly when ovulation occurs.

[TatiSevani_]

the pill can messed up her periods one of my close friends had took the pill and her cycle came a week late .