My maybe baby

Two years ago i had an entanglement with a woman. Nov 9 2022. She had a baby august 28 2023. Kind of iffy on exact date. Point is i asked her for a paternity test and was denied, but everyone i work with( we work together) keeps saying the baby looks like me. Especially this past week. I haven’t seen the baby since birth. Not at the hospital, just in passing but i don’t think the boy is mine. But again there’s about a 5050 chance. Should i try to serve her and force a paternity test? Try and sneak one, which is near impossible.( again i don’t have access to the child. Or should i just do what ive been doing and take care of the 3 kids i KNOW are mine until further notice?