Hello mam, thanks for trusting health care magic.
In my opinion as your urine pregnancy
test is negative get a pelvic ultrasonography
and b HCG
testing because it can be an early pregnancy or worse ectopic tubal pregnancy and then visit a gynecologist with reports.
Dont take it lightly because your symptoms are more suggestive of ectopic pregnancy.
In case you have further questions you can consult me on health care magic forum and i will be happy to help
Take care and wish you all the best.
Dr Manisha Jain