Low Lactobacilli & no Bifido Growth for years

Not sure if anyone can help. for years my stool tests have shown very low growth of lactobacilli and no growth of bifidobacterium in my stool samples. I take high dose probiotics daily but for some reason they are not allowing the good bugs to colonize my GI. Anyone have any idea whats going on? I presently have overgrowth of enterobacter clocae and alpha hemolytic and beta strep. no parasites or candida just a small amount of yeast- i am desperate for answers