Hi L.,
Sounds like your daughter is figuring out how to keep you in bed so she doesn't have to go to bed. It also seems like you have tried the typical things; how long have you done the sticker chart thing? Any change in behavior is going to take more than a week, especially a big one like sleeping in bed alone. If your daughter is used to having you there with her, she is going to have to learn to be w/out you. And the longer you linger, the longer it will take for her to get used to being in her bedroom alone.
And you also have to be consistent with your expectations. If you say no, then follow through. No matter how tough it is, the little rough patches now will pay off in the end. I would stop laying with her only because she is learning to sleep with you and not without you, which is what you want in the end.
Try finding some library books about going to bed, sleeping in your own bed, etc. YOu could also give her a photo of you to keep next to her bed for her to "talk to" and keep there so you are "there" for her. And once you leave, don't go back in the room! Unless you know she is sick, there really isn't a reason to go back into her room. If she gets out of her bed, be very firm in telling her to get back into bed and stay in bed. You could also use a music box; we have one that is on a time, so after fifteen minutes it shuts off.
I am a Kindergarten teacher and also the mom of a 18 month old. Kids between four and five like consistency and follow through with rules and expectations, so you have the hardest part right now. When you feed into every little whim, your daughter is learning that she can control bedtime instead of you. Do all the bathroom/drink stuff BEFORE stories and getting into bed. Read two or three books, then lights out. If she asks for anything, say no, you are all done for tonight. Quick hug and kiss, and then leave the room.
Our daughter has been used to laying in her crib by herself since birth, so we rarely have problems with her wanting us at bedtime. We also make sure that she is tired enough so that she wants to sleep. Hope these ideas help. Good luck and sweet dreams!