Need loads of pregnant rabbit help please:(?

Heyy, I have a female pregnant rabbit, she is nearly about 4 weeks pregnant I think, not sure on the exact due date bt she is behaving odd, before she wud run around all morning and eat loads and drink loads and play and be noisy bt now, well in the past 2 days she has been lying around loads and doesnt use her cage and keeps lying on my bed. She doesn't eat or drink much, very rarely wud she eat or drink or even move from the place she is. She wud just sit there or lie and that's it. She shud be giving birth any day now. Bt she did make a nest last week bt didn't outline it with her fur. Just made it out of paper and now she's broke her nest and left her cage. Also she used to dig around a lot and still does rarely + she pulled her fur out once last week bt kept it in her mouth and then dropped it. I'm worried that she is not going to make a nest for babies and why she isn't eating or moving much. Please help.