I'd say if your doe passes day 32, take her to the vet and have an xray done. I had an English lop that twice had to have a C-section because the first kit was breach and it was stuck. This was also her first litter. The second time her body it seemed jsut could not produce enough oxytocin to fully birth the babies.
Shortly after this ordeal I had another French Lop doe due so now being worried it would happen again, I took her ot the vet. She was drinking so much water (as pregnant critters do to make milk in the final days of pregnancy) and her belly was also hard and she was spending a lot of time inthe nest box. And xray revealed.....poop. She was plowing through al lthe extra food I was giving her thinking she was pregnant and getting fat. No babies, I suppsoe she didn't catch. It happens.
But if she has perhaps already gone into labor or her body has tried to and there is a breached kit, you shoudln't waste time, the doe will begin to weaken very quickly. I had noticed Calisto going into labor and chcked on her constantly within the hour...but then figured she wasn't having them becauseI was bothering her. I went to bed for the night. the next morning she was still covered in blood and hadn't had those babies. I didn't have a car so it took me even more time to arrange to get her to the vet, which is an hour away. She had then been in labor so long her body was very weak, and she had problems recovering from the anesthesia and they almost lost her during surgery.
Best of luck.