If you will do 2-4 cups warm water enemas with about 3 tbsp of either apple cider vinegar, 3% hydrogen peroxide or homemade kefir, you may start to see strange things exiting into the toilet. (Do the enemas after a bowel movement naturally.) There might be string cheese looking things, wet white tissue paper things, yellow gel, mucous attached to a burnt orange crust, or dark seaweedish looking things. These seem to be various ages & stages of candida.
You should also get die off, fatigue, itchiness, flu symptoms. It can take a long time to get rid of it out of the colon - dozens & dozens of flushes until you see no more - if you have it. You will feel so much better afterwards. Then you have to think about what is likely inside the rest of your intestines, which is much longer.
Kefir, coconut oil & judicious amounts of some other products can help.