Test or wait for period

Demetra • Mom of 1 boy& 1 girl💜 Number 3 when God is willing!
So i had a baby 6 weeks ago. Around 2-3 weeks postpartum, I started having sex again. I want to get on birth control but if there is a possibility i could be pregnant again, should i stick it out& wait for my period if it ever comes or go ahead and take a test?