I think there is a strong chance you have it as well. Many of the forum members have these symptoms and I once had these symptoms. It can take a very long to recover from candida overgrowth, but you will feel really good and strong in time (hopefully).
I had a bunch of tests done as well and they could not find anything wrong with me. The reason is because western medicine doesn’t really acknowledge candida. If they did, then many of the worlds health problems would be solved and we would have less people dying/suffering from various diseases and ailments. The health system would collapse and people would be healthy.
If you want the #1 reason you likely have candida, it is likely from prior antibiotic use in your lifetime. Antibiotics stand for “against life” and remove both the beneficial and bad flora from your gut. This causes an immune system imbalance that can only be cured with the opposite: probiotics. Probiotics will be the single most important thing you need for your recovery, but before you start them, you need to kill down the candida.
The diet kills it off and afterwards you can start recovering. You will need to alter your diet significantly (likely) but if you can get past this thought, then you will be on the road to recovery.