Hi,
SIBO is food fermenting, rotting in the lower intestine where it shouldn't be happening, causing the problem and no amount of probiotics will cure it, in fact it is more likely to feed the SIBO, if it can get down to the small intestine. A course of drugs, Antibiotics, is required to neutralize and kill it off with strict adherence to the prescribed diet as well. After the course then back to your normal diet being wary of what you are ingesting incase it happens again. If lucky 10 days of medication will kill it off, a second course may be required to be sure. If this doesn't work it then gets expensive with a more severe course of drugs and a special diet powder. I can't comment on the latter as I haven't required it, yet.
There is little point in taking meds without the diet as you are defeating the purpose of the medication regime. Delaying the inevitable just allows the situation to get worse in my experience. Once you have it it doesn't go away by itself, it just grows, literally.
In the early days I thought I could wait it out and the body would fix it, not true, just wasted my time waiting as the symptoms got worse and became far more uncomfortable to live with.
Cheers