Severe Constipation!!! Please help

First of all thank you all for participating in the forum. I've read through many constipation related threads before posting my question. I am in despair because I did not find the answer to my problem. That's why I decided to sign up and post my question. As far as I can remember I always had constipation problems, however, last year it got very bad. First, I used Chinese medicine (herbs) and it was useless. Besides Chinese herbs, I had a lot of acupuncture sessions and they were useless as well. Second, I had about 10 colon hydrotherapies done and did not help at all. Third, I went to my doctor and I had requested to have colonoscopy done. From colonoscopy results doctor did not find anything really bad except Melanosis coli. He told me that it's because I used a lot of laxatives in the past. I've never used any laxatives, except colon therapist recommended me to use Colon Cleanse Caps and some powder (both from Western Botanicals). When I used these products I always had either diarrhea or constipation. I felt sick and frustrated. I also did blood and saliva tests for thyroid problems and thyroid was normal. I went to homeopathic doctor as well and they requested comprehensive bowel test. The test results came back normal. I did 2 liver/gallbladder flushes and so far, I am still constipated. I am eating very healthy. Every day I eat bunch of organics salads. juicing did not helped me too. Any suqestions???????????? Please help. Thanks.