Very long complicated story...need advice?

ok so I really need advice and please not judgement, that wont help. My husband is an NCO in the army. Hes belived to have Multiple Sclerosis, but they are trying right now to get him a diagnosis. He's always in pain and always has headaches. They wont perscribe him anything yet because he doesnt have a diagnosis, and otc stuff is not strong enough. Then he did research and found that Montel Williams has ms and he uses Marijuana to help cope with pain. Since my husband is in the army he obviously can't smoke that. Someone told him about K2(herbal smoke), they said its legal and he tried it and it really seemed to help relax him and helped with his headache. Now I am completly against getting high, but he's going through a lot and if something seems to help him, I want to support him. Anyway, he only smoked it a few times, and apparently someone told on him. Well he was under the impression that it was legal. Turns out that its blacklisted for soldiers here at Ft. Campbell. He didn't know that, but according to his SFC it was put out in formation. My husband has a lot of dr. appts, and he probably missed that formation due to an appointment, so he didn't know that. Well they gave him a urine yasis, and the results should be back in about a week. Now he smoked a week prior to the test. Right now hes under investagtion, and Im so scared it will come back postitive and he will be demoted or discharged. There is not much research done on this herbal smoke. Does anyone know how long it will stay in your system, does anyone know if there is even a way to test for it? Someone please help. Im so scared!