Root cause of my constipation?

So I need some help figuring out the root cause of my constipation. I am an otherwise healthy 27 year old female who has been suffering from constipation for the last year and a half. I went through a heavy metal cleanse with different homeopathic medicines and tinctures under the care of a homeopath. This is when all my problems started. Previous to this, I had the normal 3+ bowel movements a day. Always had a good bm 20-30 minutes after eating and always complete movements. During the cleanse, I started having intense Sugar and carb cravings unlike anything I've experienced. I also became constipated and would go a day or two without a bm or I would only have one bm per day and felt uncomfortably full, like my digestion just went down the hole. The homeopath, through ART (autonomic response testing), said I had high levels of nickel, copper, cadmium, lead, and aluminum. During the treatment, I expressed the new issues I was having and she basically just kept switching out different homeopathic tinctures but the constipation remained and the bloating was just aweful. I decided to stop seeing her as she obviously didn't know what she was doing.
Fast forward to now and I am still struggling with the constipation. I did a lot of research and adopted an all raw diet as I also discovered that I had developed intolerance to a number of foods during my stint with the homeopath. Going all raw helped me for a while and I was able to achieve a bm everyday and sometimes several times in a day. But I still have days where I won't go at all and I can feel the food just sitting in there. I have been taking the Barefoot Herbalist's LBB herbs for a few months but I still only manage to achieve only one bm a day lately..if that. I drink plenty of water, my diet is obviously incredibly clean, I exercise 5-6 days out of the week and I do not take any prescription meds. I am honestly getting very frustrated trying to figure out the root cause for the change in bowel habits.
Here are my thoughts as to what might be causing the constipation/change in bowel habits:

*Parasites- I have never done a parasite cleanse but am preparing to soon. I have heard that they can clump up in the colon and cause a change in bowel habits. I occasionally will have very thin, pencil-like stools which leads me to believe that they are clumping up in my colon to cause more narrow stool.

*Over-burdened Liver- I have never done a Liver Flush or taken liver supporting herbs but I am also going to embark down that path here soon to see if that may help. I have taken prescription meds before in the past as well as Antibiotics ..just not very much or for very long. I also experimented with drugs as a teen as well as did my share of drinking. I do still smoke weed but wouldn't think that would have a huge negative effect regardless.

My last thought I'd that maybe the homeopath stirred up the metals and was not well-educated on clearing them from the body in the proper way so maybe they just re-circulated in my system and caused the constipation?! I really just need some advice as to where I should start in trying to fix this because I do not want to have to rely on enenas and laxatives of any kind! Please do not give me "constipation remedies" because I can assure you I have tried EVERYTHING out there as I have perished curezone as well as other self-healing sites and I do not want a "quick fix" solution but to rather get to the root of the issue. Thank you!