Mystery Sleepies

Today I've been sleeping since around 3pm and I actually woke up around 3:40am. This is the most nocturnal thing I've ever done lmao sleeping for 13 hours. It's currently 5am I've been awake since I woke up as if it were a regular day. I started my period the day before and I've been taking naps lately. Not only that but I've been wayyyyyyyy sleepier than usual even when I get enough sleep! I've been sleeping in classes I usually never sleep in. Could this be a symptom of my period or PMS? Am I the only one?