Ay, ang 3 months postpartum ay kinda borderline pa, most dentists prefer to wait until around 6 months or after kung tapos na ang breastfeeding, kasi hormone levels pa rin unstable at gums are usually more sensitive at swollen pa from pregnancy. Pero kung sobrang urgent na ang tooth (like infected or causing severe pain), okay lang makonsulta ng dentist ngayon para ma-assess, they can do necessary extractions with proper precautions, especially kung breastfeeding ka pa. Better check din with your OB or dentist together kung paano ma-manage ang anesthesia and meds while nursing, para sure safe.