DMX was supposed to be going to rehab and traveling with a sober coach.

But last week the 47-year old -- who is out on bail as he awaits sentencing for tax evasion --  was videotaped doing shots at a St. Louis airport bar and ranting about God.

Now the other shoe has dropped. X just tested positive for opiates, cocaine, and oxycodone.  That puts him in violation of his probation and he's been sent to jail until his sentencing in March.

The drug test was ordered after prosecutors viewed the tape of X in St. Louis.

I'm saddened and disappointed. We'll have to deal with it accordingly," X's lawyer Murray Richman told TMZ.

Richman added that he will try to get X into a rehab facility.