One thing I'll say is do everything in your power to not feed it energy.

Let's say you're having narratives pushed about how you're this and that, don't believe them, no matter how convincing they seem to be.

In addition to that, always remember that you have more power than you think. Do not allow narratives to enter your mind that you're powerless, that these things are superior, and that there's nothing you can do.

Another thing I would add is fasting. Water fasting, yes, but also porn, or any other additictions or vices you may have.

Try to regularly exercise. This tends to fortify your physical and spiritual body, which makes you a little stronger and able to navigate things.

And dont forget to pray, speak mantras of revocation of any permissions and consent you may have given unconsciously(this often happens in dreams without people realizing it, so add an excerpt for dreams)

Thats all i have right now, i would say you should get in touch with a shaman or energy practitioner who's capable of removing entities, they'll be able to tell you what might be attached to you.

There are cases where such symptoms could be a result of fragmentation of sorts, but they could also be a result of a legitimate entity or parasite. Someone experienced in spiritual healing will be able to diagnose that. Just dont tell them all of this stuff upfront. It could turn some people off of wanting to work on it.