I just went through the first two pages of links that you posted, and I didn't see one single link that was from a source I would consider reliable. Alternative/natural medicine is often misunderstood and villainized because it's not understood - not because it doesn't work or have negative consequences. Just look at all the hulla balloo about
using herbs for treating these infections - and yet many have healed with them when they are used properly.
Many also make the mistake of not believing herbs and natural remedies to be very strong, and then end up 'in trouble' and blaming the herbs/natural things for the increased issues, when in reality it's "user error" that is to blame. More is not always better.
If you were only using one single strain of probiotics, then right there is the issue. We have a LOT of bacteria in our gut - 100 TRILLION - so by only using one strain to help combat issues will definitely make things worse. We need as many strains of good bacteria as we can get in our probiotics. I like kefir for this reason particularly - homemade versions can have as many as 32 different strains of healthy bacteria and yeasts to help bring the intestinal flora back to health.
I'm NOT saying this to convert you to my way of thinking, but in an attempt to help you find the right way to get through this. I've been in treatment for these infections for the last 9 years, so I've learned a few things along the way.
Using abx or herbal abx without using probiotics (many strains!) will certainly lead to serious yeast and fungal issues. Links from the first two pages of a search I just did to support the use of probiotics while using abx - reliable sources linked only: https://chriskresser.com/what-to-do-if-you-need-to-take-antibiotics//www.ncbi.nlm.nih.gov/pmc/articles/PMC3105609/www.drweil.com/vitamins-supplements-herbs/supplements-remedies/probiotics/www.livestrong.com/article/507055-when-does-one-take-probiotics-when-taking-an-antibiotic//www.ncbi.nlm.nih.gov/pmc/articles/PMC2095085/www.health.harvard.edu/blog/probiotics-may-help-prevent-diarrhea-due-to-antibiotic-use-201205094664
"Eating yogurt or taking a so-called probiotic when you have to take antibiotics may help prevent the diarrhea that often accompanies antibiotic treatment.
That’s the conclusion of a study just published in the Journal of the American Medical Association. A team of California-based researchers combined the results of 63 randomized trials pitting probiotics versus placebo among almost 12,000 men and women taking antibiotics. Those who took antibiotics plus probiotics were 42% less likely to develop diarrhea as those who got the placebo."