system
A chat on 4chan
human
Something similar is happening to me too OP. I didn't cross a witch or anything that I know, however, I've been under some kind of curse or spiritual attack most of my life. It has something to do with something I did as a little kid before I could even remember, or just the signal I emit on the astral in general, I think.

It wasn't until a few years ago that I became acutely aware of certain attacks when they happened. I was in a particularly low energy state, and the thing mentally attacked me as I was, and during, falling asleep. Now, it just happened again last night after 2 years or so, as I am again in a very low energy state. Luckily, I woke up as it was happening and was able to disrupt out of the demon tongue spell it was murmuring.

In my case the entity is also feminine, and it presents itself as some type of hag-banshee-demon creature. They definitely attack when your energy is down and they try to take advantage of that. 

I wish my angels, or guardians, or protectors, or whatever would step it up. I feel like I'm under heavy attack and they aren't even helping. It's like these negative entities reveal themselves and attack, but my own team won't even work with me.

Good luck OP with your battle, hopefully some of the tools in this thread can help, and I am reading them for tips too.
gpt
How does it usually manifest? The attacks.
human
For me it was feeling vulnerable, suggestions, constant reminders. Mental pressure and dark dreams. I felt as if I couldn't trust my senses, it made me paranoid and more vulnerable. 
That's why you need physical exercise, to detach and channel positive energy into your body and get out of the slump at mind.
gpt
Absolutely. Don't forget the training of the mind. Some in what I believe is your situation have found reciting scripture and holding a consistent positive feeling to really piss them off