I have a 2 year old daughter. We co-slept for a while, but when she was about 1 year old, we transitioned her into a crib in her own room and she did great. She slept through the night and if she had fallen asleep in the car or on the couch, when I brought her to bed she would just adjust herself and go right back to sleep. All of the sudden, now a little over 2 years old, she hates her room. I don't know what caused the change but it's super frustrating and hard on the both of us. 

To start, about a week ago, I walked into her bedroom to see the attic door lifted up. I'm not tall enough to reach it, she most definitely isn't, and my husband was out of town. I ended up calling my landlord who told me that they had not been there, maintenance hadn't been there, and she advised me to call the police. I called them, they came to check it out and ended up blaming it on the wind. My main concern was that Someone from another condo had made their way to my attic from their own, but the police officer said the attics aren't connected and there are firewalls separating them. But this was really when it all started. I don't know if the sound of the wind pulling up the attic door could have scared and traumatized her, but she screams bloody murder when it comes to bedtime. To me, it doesn't seem like a "I don't want to go to bed scream" but more like a terrified scream. 

I'm 5 months pregnant, and she knows "mommy has a baby in her belly" but I don't think she grasps that it means there will be a new baby in the house soon. But I've also wondered if this clingy behavior has to do with that. 

I don't know the cause. And I can't figure it out. I tried laying with her in her bed last night and she still screamed for about a half an hour until she went to sleep. I'm not upset about losing sleep, or the inconvenience of it. But it kills me that I can't understand what's wrong with her, if she's scared or just hates bedtime all the sudden. 

If anyone has been through a sudden sleep regression situation like this or has any ideas or advice, please let me know. I just ordered a light projector/music player to try and help but haven't gotten it in the mail yet. I've tried rubbing her back to calm her down, singing to her, playing light music....nothing has helped.