Feeling of inadequacy

So this week I’ve been coming home late due to a heavy workload. I’ve been coming home late exhausted and whenever I get really worn out I don’t sleep well, I get nightmares. They are almost always of people invading my space or breaking into my house. Last nights were traumatic, a man had broke in to my house and had assaulted my son. My ex-mother in law took him there and she looked at me with distrust and resentment (they all wanted me to hand over my son to them but from the very beginning when their son divorced me when he was 7 months old I decided to raise him on my own) I woke up after that scene and I feel traumatized. I feel inadequate and second guessing myself in keeping him safe. And if I’m being honest, I haven’t dated ever since and one of the reasons is that I just want to keep him safe. I just feel so traumatized over a dream. Most of the time they don’t shake me but this one did because it involved my son. As a single working mother, I feel like I’m not enough sometimes, and it sucks.