Just got primary custody, feeling conflicted

After 18 months of court battles, I finally got primary custody of both kids. It was what I wanted and what I fought for, but now that it's official I'm having all these weird feelings. I'm relieved, excited, but also guilty somehow? Like I'm worried the kids are going to resent me for the split even though their mom is still very involved. She gets them every other weekend and two nights during the week. Anyone else go through this? Does the guilt go away or is this just parenting now?