Be VERY diligent to get every ache and pain thoroughly examined and documented. Do not ignore anything. My wife was in a similar accident about 18 years ago and what initially seemed to be minimal injuries turned into lifelong severe disabilities.
Beyond the physical injuries, the mental anxiety and stress can become overwhelming, especially after things settle down a bit. Seek and follow excellent medical advice, both physical and mental.
Document, document, document everything for possible future medical, insurance, or legal challenges. Been there, done that.
My thoughts and prayers are with you both for a good outcome.