What happens next?

How to prevent benzodiazepine overdose
Stick to the recommended dose.
The easiest way to avoid overdose is to follow the medication dosage provided by your doctor. Generally, you will start on a smaller dose, but your doctor may gradually move you up over time if you begin to develop a tolerance to the medication.
Either way, sticking to the prescribed dosage should help you avoid an overdose. If you're unclear about how often you should take your medication, talk to your doctor or pharmacist.