Hello,
First of all, I am glad that you did not get injured during the accident, it is very important that you refrain from driving until we sort your sleep issues.
You have to analyze why are you not sleeping during night time, are you working late? Are there any other issues that keep you occupied during night hours?
Since you are sleeping during day time, that implies you are normal just with an irregular sleep pattern.
There are certain exercises that can help regularize your sleep pattern, for that most important thing is you yourself analyzing the factors that have caused this deviation.
Try addressing your worries, the ones you can work it out face them, the ones you cannot, don't bother about them.
Lastly yes elder individuals have sleep issues, however, that doesn't mean it can't be addressed and resolved.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr Jatin Bhatia,
Radiation Oncologist