Hello,
In such cases,
pregnancy is possible if it is occurred around ovulation time or fertile period. Therefore, you need to undergo one home pregnancy test or
blood test for
beta HCG to confirm pregnancy.
In exclusion of pregnancy, other reasons for late period are
hormonal imbalance, stress/ anxiety, thyroid problem, wt gain/extreme loss, irregular eating habits, psychological factor etc.
Then, you may require some investigations to rule out underlying pathology through USG pelvis scan, thyroid profile & other hormone assay etc. Consult with your gynecologist and take suggestive measures.
Avoid stress / anxiety, take healthy diet with vitamin &
iron supplements, eat more fruits & vegetables , drink plenty water or juice and maintain genital hygiene properly. For breast discomfort, you can wear tight support & take prime rose cap.
If you need further consultation with me, then you can visit http://www.healthcaremagic.com/doctors/dr-soumen-patra/63326.
Take care yourself.