Worried. No judgement please.

I am married using my (ex)husband’s last name and separated (not legally pero to follow nalang siguro kasi magastos and mabusisi pa), now Im pregnant with my new boyfriend panu po kaya ung process sa last name ng magiging baby namin? May ilang months na po akong bothered anu mangyayare once lumabas na ung baby namin. Thanks in advance po!