It sounds like you are doing all the things you need to do. I would check the house out, though. Hidden mold, rodent damage, radon, and carbon monoxide could all be factors in your health when you are only at home. I’m not downplaying faith and magic. I always recommend the physical plane is fully investigated, too.
Return to sender, freezer, crystal, and candle magic is more than enough to bring peace. Francisco has a salt in the corners of the home spell to fight negativity. I’ve seen it bring comfort to close friends and you might want to try it.
You mentioned the light of Christ. I don’t know what you believe when it comes to divinities. Most Christians believe Jesus inhabits them spiritually. If the God of the Universe resides within you, nothing can stand against you. That goes for any deity you might serve. They protect you. They keep you safe. We’re mere humans. They are Gods and Goddesses. We don’t have to fight and when that clicks in us, we find freedom from what oppresses us. Just my .02.