My daughter has been getting up before 6 am, I'm exhausted!!

I have a 3 year old daughter and a 6 month old son. My daughter regularly gets up anywhere between 4 30 and 6 am and my son wakes up several times a night. I am exhausted, I get on average 4 hours of sleep a night if I'm lucky.She goes to bed at 7pm and any later it's a complete nightmare to get her to bed. I've tried an alarm clock set to 6 30 for when she can come wake me up but she just unplugs it or ignores it and wakes me up at 5 anyways. She'll say she's hungry but doesn't eat what I give her till like 6 30 or 7.My son use to only wake up once in the night so it wasnt too bad but now he's waking up almost every hour and I have no idea why. I have to get some sleep or I'm gunna go crazy, please help!!! via /r/Parenting https://ift.tt/2NB3Q13