Dear Josh,
I have gone through periods of intense dejavu during my childhood and early teen years. I do understand the kind of disorientation this can cause.
I also experience the perception of signs. This could be both good or bad. You have shared regarding your experimentation with drugs to access altered states of consciousness. I would only recommend that you try to avoid any extra-normal stimulation.
There is a technique that I have been working with that can do literal wonders and miracles within your consciousness and for healing of every sort. It is all dependent upon your need. It will do exactly what you need. This is the Grace Light. You can find out more about the Grace Light at
http://www.thegracelight.com. For $5 you can download the streaming video of the first 4 gates of the Grace Light, which should be good for you to use to practice the Grace Light for the next month or so, then you can move on to the full 9 gate process. This is the highest teaching given by my teacher, Dattatreya Siva Baba.
Regardless of what is happening with you - the Grace Light will be extremely helpful to you. Beyond that I would recommend that you try working with some of Baba's teachings if you are open to that. If you work with Baba's teachings, he will watch over you and help you. You couldn't get better help and guidance than through connecting yourself to Baba through working with his teachings. He will be able to help you through this time and make sure that it works out for the best for you.
Let me know if you are interested in trying this out and I will give you more details.
For now I would suggest you say this mantra 108 times each day - Om Saum Saranabavaya Namaha.
The pronunciation is very easy - Saum sounds like "sow", like the female pig then add the "m" to the end. The rest of the syllables are pronounced all the same, just like AH vowel sound all the way through - SA RA NA BA VA YA ... NA MA HA
This mantra will bring a healing energy and will protect you from negative forces.