Ok so nice been trying to stop my 3 yo from sleeping with me. She's been using my crib that I set up…

Ok so nice been trying to stop my 3 yo from sleeping with me. She's been using my crib that I set up until her bay bed gets here, but every night I let her fall asleep with me & then I put her in the bed... Some night when I can't sleep I know I'll be able to put her back in he bed & then are some nights where I be so tired I don't even noticed that she crawls right back into my bed... Wondering is there anything to do to keep her in the bed all night .. I already tried putting something that smells like me next to her , I've tried a doll to make it seem like it's me laying next to her ... Baby will be her in a month and a half & I just want to have my bed back to myself