Questions about Supplements

I have fish oil, probiotics, vitamins E and D, turmeric, coconut water, wheat grass juice, bromelain, neem leaf, boswellia... the list goes on.

So here's my question:  I have taken about 6 different supplements for about 2 or 3 months now and noticed NO difference at all.  Am I just wasting my money?  I was convinced that somewhere, something would make a difference.  But it's all so expensive, at this point I feel like just starting all over again at square 1.

Another question: Is there some supplent that YOU take that you are sure is doing something for YOU?  Just curious what it is and how much you take.

Thanks!