Deep sleep for 12 hours. For this.

Hi, Yesterday afternoon i went to deep sleep for 12 hours from evening 4 to morning 3.30. First time in my life i went to deep sleep. So when i wake up i afraid.may i know why i am having cold before the sleeping day, i didn't used any medicine for this. But today also i am feeling sleepy but anyway i am not sleeping. few things that i did few days before: 1. I got motions because of over night work( not digestive) so i used Pedotil ,Pantacid. Then in the afternoon i used Eldoper after i used eldoper motions stopped that day is fine. But feeling difficulty while going for motion next day 2.I went to office on next & every thing fine 3.On Yesterday ( Saturday) i went to sweet shop & bought some high quality kaju sweets & had those 3 & had food. I went to sleep( this is the long sleep in my life ) 4.So my question is what is the cause for long sleep A) because of cold B) because of sweets ( more carbohydrates) C) may be there is some infection inside stomach