Hi Jessica
Everyone is correct, being tense (sometimes you might not even be aware that you are sitting or standing with your entire body or certain muscles tensed) will increase the "shakes".
For me the harder I try to stop my shakey hands, the more they shake. I try my best to just not worry about it and accept for the time being I will have shakey hands.
Try to notice how you are breathing also, usually upper chest breathing is rapid, try to find some breath exercises to do that are "belly breaths". Pratice these everyday and it will slowly alter your breath pattern and make you feel more calm, less anxious.
Adrenlin release when we are nervous and anxious makes people shakey. This will last until the adrenalin wears off the organs in your body.
Try the breathing, meditation and try not to worry (hard to do I know) about the shakes, its just another symptom of anxiety and is totally harmless.