Because of diazepams long half life, steady use can cause you to not get sick for days, sometimes longer. However, you were only doing 10mg's, so there isn't as much that needs to leave your system. You've only been on it for a little over a month also, so I'd say right around the time your refill arrives, will be when it starts getting pretty shitty. It'll probably be pretty perfect timing. If I were you, I'd break that 10mg up and make it last as long as you can. If you take just enough each day to stave off withdrawals, just a couple mg's, it'll be enough to last you till your refill and you wont have to worry about the horrible and possibly dangerous
benzo withdrawal.
If for whatever reason, it does start getting bad before your refills come in, go to an ER. It may be a extreme given your low dosage, but still, prepare for the worst just to be safe. Benzo withdrawal can be very serious. Seizures, etc. The doctors treat it seriously, and if you go in there and are clearly sick and tell them you're dependent on benzos, they will help you. Like I said, last resort.