Trouble sleeping after ex broke in

My ex broke into my house last month. Some nights I’ll sleep fine but other nights I’m hyper vigilant and scared. I’ll wake up to the smallest noises in my house and worry that it’s him and that he’s coming to hurt me. I put a lock on my door so I’ll lock it if I remember but sometimes that’s not enough and I’m still fearful. I feel like a fraud because he never really directly physically hurt me. Has anyone else experienced something similar and if so, what helped? I want to feel safe in my own home again. I have a camera coming in the mail this weekend so hopefully that extra sense of protection will help. Trauma is weird.