Thanks for writing to us.
Since your periods are overdue and pregnancy
test is negative, you need to have hormonal
treatment for withdrawal bleeding. The symptoms you are having are likely to be pre menstrual symptoms and these will subside once the periods start. Meanwhile you can take mild pain killer like ibuprofen
every 6t hourly.
I hope this information has been both informative and helpful for you.
Dr. Rakhi Tayal