Baby naps

So I've posted about my daughter not sleep very well lately. Last night she woke up at 2:15 and wouldnt go back to bed until 4:30. This has been going on for weeks now when before she slept through the night fine. Now as of the last few days she is taking these long naps. Yesterday her first nap was 2.5 hours. It's very unlike her. She was always 3 naps a day 30-45 minutes each. I dont know what is going on with her. Any tips to try and figure this all out?