How to help my child get over his fear of being alone/going up the stairs when the house is quiet?

My son is ok with being alone as long as his TV or iPad is on. However, if all electronics are off upstairs and it’s dead quiet, he freaks out and cannot stay in his room or even go up the stairs. I don’t know how to help him. I started off right and then I got frustrated and ended up telling him that his fear is ridiculous, which led to me and my husband arguing because I fee our kid is ungrateful. I am 100% wrong for saying this stuff and in a fucked up way I tried bullying him into facing his fear, which of course didn’t work. I feel awful and I don’t know wtf is wrong with me. I’ve never acted like this towards my son.I want some tips of how to slowly help him face this fear without further traumatizing him. Thank you. via /r/Parenting https://ift.tt/2XvMV8p