When should I refill my hydrocodone prescription?

I got a script exactly 30 days ago for the 5/325 Vicodin, 30 of them. The Dr also gave me 60 naproxen. He told me to take the naproxen for everyday pain (I have degenerative disc disease) and to take the vicodin only on the days that I have bad pain. He also said that the 30 he prescribed me should last me a long time. Well they would have but last week I had a pill addict come over and she stole the whole thing. I was going to make a police report and call my dr for a new refill but I had a ton of people (including a friend that is a dr) tell me that they will red flag me as a addict if I do. I definitely don't want that to happen as the vicodin is a life saver some days. When should I refill??