2 old will not fall asleep at night...

I’m so tired of fighting her for 2+ hours to go to sleep... every night it’s the same thing over and over again. We’ve tried putting her to bed earlier... we’ve tried pushing her bed time later... cutting naps shorter( she’s a night mare by 5:30). Sometimes the only way we get her to sleep is to lay down with her but it still takes an hour and one of us ends up falling asleep with her 🤦🏼‍♀️ then by midnight she’s in our bed. We would take her back to bed, but 2 hrs later she’s back. Lately I’ve been taking her back to bed because she’s such a crazy sleeper and I get no sleep... sucks at 16 weeks pregnant. We switched her over to her toddler bed because right after Christmas she would start screaming bloody murder when we’d put her in her crib. And for 2 months she did awesome in her bed... we’d tell her stay in bed and she would maybe grab a book but stay in bed. Then one day a switch flipped, I’m not even down the hallway before she’s out of bed. I need help! 😭 I want to just put her back in the crib I’m so over the fight but I don’t want the screaming...