Sleep advice

Hey, Hope you’re all ok! Looking for some advice on toddler sleep because I honestly feel like I’m at my wits end!!! My almost 3 year old has always been a really good sleeper, would settle on her own and sleep through unless she was unwell. For the last 2 or 3 months bedtimes we’ve had to sit in her room till she falls asleep, it can take anywhere from 30 mins to 2 hours sometimes for her to fall asleep, and then when she is asleep she’s up atleast twice in the night, first time we usually manage to settle her in her bed but the second time she gets out of her bed hysterically crying and ends up in our bed, it’s getting to the point where she’s just crying and crying we end up having to put tv on for her and can be watching tv for up to two hours in the night before she falls asleep. For a few nights recently she’s been saying that her ear hurts but doesn’t mention anything about it in the day, has no temp or no other symptoms other than is abit snotty so I’m wondering if she’s doing it to try and get into our bed? She will honestly scream until she gets what she wants. I’m currently trying to put her to bed and she’s just rolling around on her bedroom floor refusing to get into bed, I’m trying my hardest to stay calm and I’m trying everything I can but im at the end of my tether. Today I’ve made her a reward sticker chart for her room to try and get her to sleep and stay in her own bed but honestly I am at a loss. Any advice would be greatly appreciated! Thank you xx