hi! me nd my gf had sex on 26th feb for the 1st time ever without any protection but with pull out/withdrawal method but am not sure if a drop or two dropped inside. Her last period started on 8th feb. She has 30 days cycle. She is still not in period. She feels nausea, headaches and also she is more sleepy than usual. Please can anyone guide me whether she is pregnant or the reason why she isn't getting periods.