Have you been able to feel any babies? If you flip her onto her back (she may or may not cooperate with that, just be gentle but persistent) you can sometimes feel little marble-like things on her tummy. Did you monitor her weight? We like to weigh them the day we breed and then again every week. If she's consistently gaining, there's a good chance she's pregnant.
I've tried feeling for babies and felt nothing. I haven't weighed her, but she does appear to have a fat round belly. She's not the friendliest rabbit. I don't believe she was handled very much before I got her. If she got prgeo when I rebred her to my buck, she'd be due on the 21st. She is driving me batty.
She was due yesterday. Still no babies. Her nest just keeps getting bigger. I put a piece of cardboard in her cage today and she immediately started shredding it.