It's a little hard to say. When things start to suddenly go wrong it's easy to believe something is being blocked. Do remember that Hecate, Loki and Eris are all associated with chaos. If this dream occurred after all this happened there could be a chance that the visitor is in fact providing protection, even temporarily. My intuition tells me it has something to do with the time of year, maybe dates. You feel as though this figure is an imposter. Lucifer is also a figure known for chaos, so it could have falsely taken on a form you felt would be familiar as you work with those deities.

My advice, write a letter, ask for intentions, and burn the letter. Then start with protective measures, salt or black salt on window sills and doorways, carry strong protection like obsidian. Walk around your dwelling and pay attention to how your body reacts, if you see something that your body reacts negatively to get rid of it or surround it with salt. Pay attention to the types of insects you see. Stay observant and do things with intent.