Found out Husband does coke

I found coke inside his wallet I confronted him and of course he is denying it saying it’s his friend .i call BSI'm not sure at all what to do after confronting him he packed a suitcase and left saying I make him so miserable etc because I told him in the morning I will be taking him to get a professional drug test done ..I am currently 9 months pregnant so lost at the moment Smh I never saw the signs