Tired

I have realized that my lack of sleep will catch up with my teenage "superman" status. I'm not superman, just want to get that out there. But I can go without a lot of sleep for a while. Not completely without sleep every night but I mean the latest (earliest) I have stayed up during my vacation in Australia is 5 AM. But today at like 5-7 PM I was becoming drastically tired, worn down, and just felt like crap. I think I need some sleep (duh) but I want to enjoy the rest of my time here with my family. When I become tired people notice and suggest a coffee, but I say nooooooo. I'm so sensitive to caffeine it's ridiculous. It absolutely does the opposite for me and just creates this weary-sickness in my brain and all throughout my body. I have a constant hangover for about 30 minutes, and it just ugh I can't describe the feeling haha. But anyway me complaining my tiredness I guess won't wake me up. Do any of you guys have a bad affect from coffee cause I sure do. I also hate when I get like 5 hours sleep (my fault) and have to get up (my fault) earlier in the morning. I take a shower and that generally gives me a little boost of energy for some reason, but when I get in the car to go somewhere my eye lids feel like stones and I just feel like sleeping. At 11:30 in the morning! You know when your eyes just get so heavy and tired it's almost like you fight it to stay awake, it's so challenging. But i must say I'm very tired, maybe I should go for a coffee. :P