I Have Insomnia

So i finally saw a sleep specialist and i have a home sleep test to do thursday. While shes pretty sure based on what im describing shes just wanting to make sure nothing is causeing it. She has diagnosised me with delayed sleep phase syndrom. Essentially my internal clock is a little off and my body naturally wants to go to bed later and sleep later. She was saying sleep meds rarely help and while u can train ur brain to fall asleep at a "normal" time one off night and your back to square one. Im a little in shock. I never thought my insomnia could be related to something thats extreamly diffucult to treat and lifelong