The key is to listen to your body. Probiotics are great! Yes at the tright time. If you have leaky gut, you should NOTT ise probiotics.
The problem with candia is not to know are the symptoms due to die -off (Herx reaction)thus helping or aggravating. Try to stay on the safe side and avoid feeling pain in your intestines (which is often the precices to leaky gut). Heal this pain with marshmallor roots and AVOID doing anything that cause pain there, you do not want to go back to square one and start healing - healing from leaky gut can be a long process.
ACV feels fine- great white stuff is coming out - grest this white stuff is drilling into the intestinal walls and can cause leaky gut (permeability of the walls) in which case you should avoir using probiotics. So do ACV and wait for the kefir is my advice to you.
Plain water enema is great too not as hard as ACV on the gut and rehydrating the colon.