Sounds like a variant of a hag attack. It’s a parasite and the weight feeling is from it stealing your energy. Banish and cleanse and set up proper wards.
Parasites always claim to be the big names to try to get your permission and compliance. Never believe a thing they say, just attack them right back. They also always pick a name you know from your mind, going for emotional effect and attempting to get authority given to them by you through name dropping to sound impressive.
We have a ton of tutorials on the behaviour of these pests, how to recognise, test them and get rid of them, and more importantly how to set up your spaces to they don’t get near you again. These nasties shouldn’t be anywhere near your private space.
My experience with Asmoday is he can be judgmental, but not pushy, and if you stand your ground he’ll eventually come around and negotiate a mutually workable relationship. He’s a high level Djini with shit to do, not really a “night mare”, in the original sense of the word, prowling for dinner.