Reaching out was a good idea! It sounds like you know you would be harming yourself if you do this. One thing I find helpful when I'm tempted is to focus my mind intently on something else. The faster you turn your mind away when you first get the inkling to go take the drugs, the easier it is. Is there a bible verse you really like? You could say that over and over. Do you like video games? Go play a good one. I have found that attempting to do a bunch of push ups will distract me from just about anything... except the need to work out more lol. So, 1-distract yourself asap. 2- pray and ask God to help you. 3- try some diaphragmatic breathing. 4- make yourself accountable to someone, like you did by posting here, and tell when you have a craving.
I pray you resist this temptation and that it flees from you, in Jesus' name.