You seem to normally wake up at about 06:30? That would be 9.5 hours sleep plus those 'several', so you must actually be sleeping about 12 hours a day? That sounds like an awful lot of sleep!
I reckon if I added up all the time I sleep scattered through the day it would be 5-8 hours depending on what I have been doing.
I haven't gone to bed at 21:00 since I was 11 years old, apart from when I have been desperately ill.
When I used to do my cycling holidays in Spain, I had more sleep than usual because I was getting tired from doing lots of riding a lot (averaging roughly 100 (often hilly/mountainous) km a day for 2 weeks) at higher speeds than I normally did. Even then though, I think it was only about 8 hours a night.
It is strange how different people's needs are... I think I would feel pretty rough if I tried to sleep more than 8 or 9 hours a day.
Anyway, I suppose it will be Wednesday morning by the time that you read this. I hope that you
DID manage to eventually get a good sleep.