How Many Hours Have I Been Up?

I got up with my 5 year old at 8am and took a 15 minute cat nap around 3pm. I've been having trouble falling asleep before 5am and I had to be up at 6:30 to get ready for an appointment. I knew I wouldn't wake up to an alarm on such little sleep so I pulled an all nighter. When I get home from my appointment my SO will be going to work so I'll be up all day with my boy. He goes to bed at 8:30-9:00pm. So I guess I'll be pulling 36-38 hours on about 3 hours of sleep. Maybe it won't be so hard to go to sleep before 5am tonight.