Hello,
I have gone through your query and can understand your concern. Since you are in the early weeks of pregnancy when organogenesis or organ formation begins, it is not safe to use any medication to relieve your symptoms. Instead, you can use simple techniques such as a hot bath at bed time, a glass of milk, reading some book which you are fond of or listening to some soft music to ease your nerves, avoid all anxiety and restless thoughts, breathing exercises etc. You can also set your sleep timings to when you can sleep sound breaking from the usual routine. Please do not worry, things will settle down as pregnancy advances. Wish you good health.