Probably you’re having “Acute Stress Reaction” due to that stressful event. Drinking and smoking only make the matter worse even though they apper to calm you initially. I recommend you to seek help from Psychiatrists as soon as possible;so that they’ll assure you with therapy and some calming medications for short duration. I Hope you’ve got the idea now and hope that you seek medical treatment rather than using substance. Wishing your quick recovery. Thank you.