A new stool test similar to what metametrix used to offer is coming out in about a month from a lab called DRG labs. They say a doctor is needed to order their tests but they can also recommend you one.
One potential advantage of this along with getting some ideas for treament is potentially you can sue the **** out of labs that failed to diagnose you and maybe doctors as well. If this test can live up to what it does this may for help for this,