hello when was the last time you had upt if it was more than 5 days u should repeat upt with first morning urine sample also tell how was your previous menstrual history were they regular or not missed periods besides pregnancy can be due to other causes like stress, thyroid disease, hyperprolactinemia, polycystic ovarian disease sore breasts can also be due to other causes like breastfeeding, premenstrual . if a patient with similar history comes to me & her repeat upt is also negative it would do her pervaginum examination to know the size of uterus . I will also do her thyroid profile, prolactin level I will prescribe her PrimulitN ( progesterone ) tab for 5 days to induce her periods, analgesics for sore breasts & call her in 2 weeks if she does not bleed after progesterone & her thyroid & prolactin levels r normal, ultrasound will help in ruling out polycystic ovarian disease .serum LH & FSH will also help hope this helps you