Armpit pain delayed menstruation pregnancy is very likely, but the symptom can also occur before the fast approaching menstruation. Armpit pain generally refers to pain in the armpits, which can occur before the onset of menstruation and is normal. It can also occur in a variety of conditions, such as mastitis or ordinary stress, postural problems, mechanical pulling and trauma can also cause axillary pain. Delayed menstruation can also be caused by a variety of reasons, such as mental stress, excessive weight loss, lack of sleep, endocrine disorders, etc. can also lead to delayed menstruation or even amenorrhea. Other reasons such as taking birth control pills or other hormonal drugs can also lead to delayed menstruation. Therefore, it is very likely that pregnancy exists for these two reasons at the same time, but it does not mean that a woman is pregnant. To determine whether she is pregnant or not, she needs to take a urine test or a blood HCG test to determine whether she is pregnant or not.