How do you deal with restlessness?

You guys, I dont know if its just me or a girl thing but I've been so easily irritated lately. Small things upset me and I let it bother me for a while. Its 0248 here and I SHOULD be asleep. But I am not. lol and I have to get ready for work (which sucks) because its a 12 hour shift but I need advices over thoughts about the future? myself as a person? stuff like that. stuff you mull over