hello, In pull out method, sometimes precum or prostatic fluid, secreted prior to ejaculation, causes pregnancy in low percentage though depends on ovulation time. Therefore, I suggest to undergo one blood test for beta hCG to rule out pregnancy. Sometimes, early home pregnancy test may give false negative result. In exclusion of pregnancy, other reasons of delayed period are ovarian cyst, hormonal imbalance, stress/ anxiety, thyroid problem, wt gain/extreme loss, irregular eating habits etc. Do some initial investigations to rule out underlying pathology like USG pelvis, Thyroid profile, other hormone assay, blood sugar & prolactin level etc. So consult with your doctor at the earliest and take suggestive measures. Avoid stress/ anxiety, take healthy diet with iron supplements, control body wt and need proper sleep. Sore breast is due to progesterone hormone. Use tight breast support for discomfort and take prime rose cap. Take care.