Am I over worrying?

[Mybabysmylife1]

Hello, quick one here. Basically I have 3 children 8/2&3 2 boys 1 girl.
Beginning of next year we're going to change 2 youngest boy and girl into a big bedroom to share as eldest boy and girl have there own room and our 2 year old boy is in my room. I wanted to put him in his big brothers room to get used to not been in our room as he's constantly getting in our bed recently. He's been in a toddler bed since 15 month old due to the cot been too dangerous for him, he's just turned 2 and only just started getting in my bed every hour of the night. My problem is, I'm so so scared that if I put him in his eldest brothers bedroom till January when he will swap and share the big bedroom with his sister, I'm scared the eldest May lay on him if he tries to get in bed with him? Really worrying me. Anyone got any advice?

@Mybabysmylife1 I may be wrong here, but I think the baby (2yo) will realise that the brother is not you and will stop climbing into the big bed). Safety wise I think it's perfectly OK (but I am quite chilled in general).
I would make it clear to the oldest sibling, that the baby is still adjusting to new room, bed, rules and that if the baby climbs into his bed he is to either tell you or tell the baby gently to go back to his own bed. Just to make sure you avoid any fights.

@ZooKeeper19 hey! Day 3 now & keeps getting in his bed luckily he does it when I'm awake so I put him back in his own bed. Youngest goes to bed first then eldest when younger is asleep, I have really bad anxiety so it makes me think all sorts xx