Ok. First I won't go into a tremendous amount of detail but you are doing yourself a large disservice by not looking into any variety of self-help tools because you feel they are contrary to Christianity. These are all natural medicines and natural techniques and have no religious underpinning whatsoever. Meditation and Tai Chi, for example, have been shown time and time again in western oriented clinical studies to improve a persons psychological state and any number of health issues (cardiovascular, endocrine, nervous system), etc. While meditation is used in buddhist and taoist circles (as well as others) it is ultimately not a religous activity per se, but a science of changing your mind. Studies have shown you can physically change the size of certain areas of your brain related to our psychological states. This is not religion, it is science. You should read my article entitled "Is Acupuncture Chinese?, A Pseudoscience?, A Religion?" Would hate for you to not improve health wise because of strongly misguided views on the subject.
All that said, if you have really taken "50" different medications you need to stop trying them. 50 different medications over time would disrupt anyones system, particularly those meds in the psychiatric realm. If you are not better by now, obviously that is not your route, and you should strongly consider not pursuing that route anymore. Western examinations and tests are fine, but the medications without a conclusive diagnosis can be very dangerous. Along that same note, I would stop focusing on the Chinese diagnoses, they are meaningless in many ways except for the person treating you. The practitioners probably shouldn't even mention these with you as people get very strange ideas without understanding the conceptual meaning of what is being said. Phlegm, being an oft misunderstood concept. Phlegm is a concept, the same with Qi, Liver Stagnation, etc. Phlegm does not necessarily mean you have any mucus issues and liver qi stagnation does not necessarily mean there is anything wrong with your physical liver. So, just focus on whether or not you are improving better in terms that you can describe not what anyone else says.
So, now, on to what to do. You need to change your mind, significantly. Easier said than done, of course, but this point is important. Acupuncture and, perhaps herbal medicine as well, can help with this and meditation is crucial - in my opinion. Prayer would also be another very important aspect as a Christian. On the acupuncture front, with conditions as severe and undiagnosed as yours you should count on 3-6 months of treatment at least before you get a significant response from someone. You will need to see an acupuncturist who has experience in treating psychological issues and ideally someone from your own country (i.e. not Chinese). This is in no way to appear biased, but in my experience even if the treatment is technically correct, many Chinese do not understand our western psychosis, so someone native to your country -may- have a better way of communicating with you and ultimately treating you. With complex cases of this nature it needs to be broken down in a clear way so you can watch for progress which may be subtle at first - not your liver is clearer or you have less phlegm, but that you are actually better and you notice and you can describe how you are better. This is important as this is what starts to heal the mind - then the body can follow to some degree. My recommendation on points would be the same that we use to treat depression (this is not your condition per se, but the points would be the same) - they are described in the Tam Healing and Tong Ren Therapy For Depression article, along with an extra point that we use with massage/acupressure primarily called Tiandong. Tiandong and C2 and the area just behind the SCM tendon in your neck (sky window area) will open the circulation to your brain and should significantly change the pulsating sensations you experience. You can do massage, stretching, etc. to open up these areas and the rest of the points you can do acupressure on should you choose to do so. Our treatment points, however, are just a guideline and you should find a practitioner you trust and work with them over the long haul. I've treated people with very serious psychological and physical issues and it can take up to 6 months or a year to fully rectify these types of issues. The more you do on the self-help front will help, particularly as the acupuncture helps to alleviate the many symptoms.
With regards to meditation, a basic guide is found within my simple meditation techniques article. And this month I will be putting up an article related to the scientific health benefits of meditation so you should read that when it comes out to understand the scientific basis for these techniques, instead of their use in some religious circles.