Having had to deal with this sort of thing (and I may be mistaken) but pushing it away with your energy may not be the best thing to do (please somebody correct me if I'm wrong here). It could be that it feeds off the energy you use to push it with (send towards it).
Recently I've realised that 'holding firm' (energetically/mentally) may be the best block to it.....but this is just my impression given it can be such an intangible subject.
What you are describing seems to fit very well with Mental Blocking technique:
Cassiopaea glossary said:
The core idea of mental blocking is to assert one's position and the nature of one's being. This may take many forms. The idea is a spiritual one for which we do not have direct terms or perception, thus we look at it through the example of everyday confrontations.
Another aspect is to be internally certain and undivided. In a
confrontation, the attacking party generally expects some reaction, either aggression or backing out. In some cases, mental blocking can take the form of giving no response or an entirely unexpected response. The main idea is not to play by the same playbook as the adversary, thus breaking out of a pattern of expected reactions.
I honestly believe, from my experiences with this same phenomena, that the above mentioned, Redfox's quote with Ana's quote from Cassiopedia are the best ways a person can combat this type of situation that occurs. I've reacted a number of different ways, from using the prayer to getting angry, to attempting to move my body, and I've found that whatever it is you do, you have to be firm, 100% in dedicating your willpower to that response in order for it to be effective.
To give an example, a few weeks ago, I had a particularly terrifying experience, that started in my dream, of some dark force approaching me while I'm trying to hide in fear. It grabs a hold of me and drags me along the road, only I wake up in the same position I was in, in the dream, and I see what appeared to be the silhouette of a woman's face floating beside me. I felt a 'swoosh' of force start at my legs and land on my back. I can feel it going up and down my back, breathing on my neck, like its sucking on me, and I couldnt do anything about it (I was scared sh**less at this point).
I tried getting angry at it, doing the prayer, mentalling projecting insults at it, nothing worked. In fact it seemed to only spur it on and it felt like I was being toyed with at this point. It was playing with me like cat and mouse (at least this was my perception of it). Until finally I had resolved, at the very least, if this is going to continue, whatever this was will have to do it face to face with me. So I put forth every ounce of effort and willpower that I had into moving my arms and turning myself around. I focused my mind solely on this task, and forced my body to move! And as soon as my arms started moving and I was lifting my torso up, the whole ordeal stopped.
This is not to say that the prayer or getting angry can't work (it has in the past for me) but whatever you choose to do you need to be firm. In my case, my first 3 responses in the situation were out of desperation, I was divided on whether it would work, so it didn't.
I hope this helps, fwiw. It can be comforting in a way to know that your not the only one that goes through these ordeals, as they are not something you can easily talk about at the dinner table or over a cup of coffee.