My hands stopped shaking after a few weeks to a month. However, a lot of medications have shakiness as a side effect, I take a steroid asthma inhaler that can make me shaky for a few hours after taking it when I haven't been using it regularly. Benzos can also make you shaky when they wear off. As a kid, my hands always got shaky when I got nervous, for instance during presentations, so I think I'm naturally prone to this when my anxiety is high. But you might want to check with your doctor to be safe.