What are my chances?

Maria

5 going to be 6 months PP on the 13th. Husband doesn’t know if he accidentally ejaculated or not 🤦‍♀️ (usually he knows and we use the pullout method, always have for almost 10 years 😅) I am nursing and still haven’t gotten my period yet. Oh yeah not using birth control either. Should I worry about getting a test soon or...?