2 year old getting up insanely early

My daughter is 2 years and 8 months. She’s always been an amazing sleeper. Slept in until 7:30-8 for as long as I can remember. Well the last month or 2 she’s up sooo early. She’s up at 6am but sometimes 4 or 5am wide awake. Sometimes laying her back down works but most times she throws a fit and refuses. There’s even been times she’s up at 3am acting like she’s ready for the day. I’ve tried everything to stop this and nothing is working.

Please help!? I now have a 6 week old and barely get sleep as it is lol