Yes pls do get legal advice. In court the judge wants the child to have the same lifestyle in both homes. Usually that means child support. Best to go for a consult. They courts care about what is best for the child. They don't care so much about who did what to who.
Me 52 H 44 T9 M 5 BD 12/11 H split 8/12 OW moved in 12/12 OW gone for good 6/14 We get closer again 9/14 SD 13 Me 4 Grown
Accept what is...let go of what was and have faith in what will be.