Many things can change our perception of time. As someone else said, meditative practices or focusing our attention can change our perceptions of time.

It goes in the opposite direction you are talking about but many people feel that time moves faster as they get older because each passing day/month/year is always an ever smaller fraction of the time you have been alive.

Yes, people can slow time perception at will, such as in meditation, for example.

When I was growing up, I would mentally slow time when playing sports to see what direction the baseball or ping-pong ball was spinning so I could unwind it, and to give me time to hit the ball. I also imagined the basketball hoops being so huge, I couldn't miss.

I did this instinctively, and later read that all great sports stars do this.

when did you get up

Depends on how well you slept,or didn't the night before, REM(Rapid Eye Movement) is supposedly the deepest,restful sleep,when dreams occur. Have you considered some Melatonin tablets before bed next time? The over the counter sleep medication ZzzQuil will knock you out for many hours,I've used both during my late wifes cancer fight,otherwise I'd be a zombie.