There is a very cheap test (more or less 30 Euros in my country) that should give you some insight: the Candida Albicans stool test. I do believe it is reliable. I've had it numerous times to keep things in check, after a very expensive Gut Dysbyosis stool test.
If you're still eating as described in your Hair test results 2 post, the only item I'd be weary of in your diet is bread. On a personal note, I'm not currently eating any dairy but, despite their yin nature, sheep/goat kefir and yogurt I think do me more good than harm.