Child sleeping in their own room

So I’m putting my son in his own room for the first time and I’m terrified... I’m so used to having him by me I really can’t fathom having it any other way plus I’m having some irrational mom fears such as what if he gets sick in the middle of the night and something happens, what if someone comes in and harms/ takes him... I’m literally scaring tf outta myself lol btw he’s 3 🙃🙃🙃🙃