Baby fever

Before having a baby I NEVER had baby fever. I was pretty sure I didn’t want to have kids period. Anyway, got pregnant unexpectedly, have a 3 y/o now and she’s THE best. Knew right away even while pregnant she’d be our only one. For many good reasons we have stuck with it. But I keep getting bouts of baby fever, SO INTENSE. I want to make it stop. Because all the facts of why I’ve decided not to have another are there, and consciously I know in my heart of hearts it’s the right decision for me. But why won’t the baby fever stop? That longing. Any tips on getting over it? I really want to get past it. Would love to hear how others have.