It is generally recommended to avoid chamomile during pregnancy due to potential risks of uterine contractions and other complications. Instead, you may consider trying herbal teas such as citrus peel, orange blossom, linden flower, ginger, lemon balm, and rosehip, which are believed to be safe in moderation. If you are still having trouble sleeping, you may also speak with a healthcare provider about potential options like antihistamines or short-term sedatives. It is important to address any underlying stress or anxiety that may be contributing to your insomnia. If your sleep issues persist, seeking medical guidance may be necessary.