I breastfeeding my baby in 8 months ans i do ont take any birth cotrol i missed my periode in 4 days?

Amenorrhea : Consider taking a home pregnancy test if your regular period does not resume in 3-5 days as expected

There is chance : Even though breast feeding provides a good way of birth control/contraception it is only 80% effective and there is a chance of one getting pregnant while breast feeding. Now four days late could be just an anomaly in your cycle, only next few weeks will tell.