Baby won’t go back to sleep

My little one is almost 3.5 months.

Our night usually goes like bath some days, pjs, book, feeding. Then she fights her sleep for like an hour. And then sleeps for only an hour and is hungry.

I get up feed her, rock her a little, pat her butt and turn on this lullaby bear she always listens to at night to fall asleep.

THEENNN almost instantly after I lay her down she’s fussing, spitting out her Paci then wanting it back in her mouth literally seconds later. And does this 20 damn times as I stand by her crib and then will finally fall asleep after 30+ minutes of that. And this occurs every feeding every 2 hours all night long.

I feel like it shouldn’t be like this. And some nights I’m just too tired to do it so I put her in my bed and she still spits it out and wants it back a few times then finally sleeps

What do I do???