Can't sleep, have to get up in an hour and a half, only got 4.5 hrs of sleep!?

It's 430 am, I'm at my aunts house and I can't sleep. It's not because I'm not used to her house or anything because I'm here all the time and I sleep here a lot too. I can't do much be BecAause my cousins asleep on the couch across from me and the kitchen is attached to the living room. My Aunt and uncle are getting up at 530 to take my little cousin to a 7 AM soccer game. But I have to get up with the baby (well he's 3. But he's my baby) when he wakes up, which will probably be around 630,7-ish. It's 5 am here and I can't sleep!! I fell asleep at midnight and I woke up at 4. I'm reall thirsty, but i'm afraid to get up because my cousins a really light sleeper. And I'm really congested and laying down only making that worse. I have reall bad seasonal alleries. What should I do????? How can I fall asleep or make myself not tired since I can't sleep??? Please and thank you!