In case you've tried everything else, here are some things to look in to:
1) McCombs plan - candida plan. If you google it you will find it. It really does work if candida is your problem.
2) Check your Iodine levels - Doctor's Data makes a test for this. Iodine is one of your detox pathways.
3) Check your heavy metals. Lead can cause chronic constipation. Doctor's Data also makes a test for heavy metals - the 6 hour Urine heavy metals challenge test. Heavy metals can also cause persistent candida (especially mercury).