Hello mam, thanks for trusting health care magic.
In my opinion do your urine pregnancy
test which if 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.
and if everything goes fine and you get your normal period then start using some regular method of contraception
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