Hi Kat! Welcome to BB! I’m going to try to help you out a little bit, but be advised that we are not a forum with a wealth of knowledge on the subject. Here are the rules, in case anyone wants to see them.
Accidental Litters: We do not have the experience to advise you. We do not allow ongoing threads on the matter because the information then goes out to google search results, inviting more of the same. Only a couple of members have some experience with this, but we are unable to make sure the advice given is reliable; we are not a site or forum that has a wealth of experience in this matter and it would be better for your bunnies to find reliable resources for pregnant/nursing does and their babies. Please visit Resources and scroll to “Oops Surprise Litter”. Other forums like Rabbitsonline.net, that cater to a broader range of experience, may also be of help. (Your post may locked or deleted once resources are given.) And of course, be sure to seek vet care and advice. Do not use the forum to give or sell bunnies as well. Since we don’t allow prolonged discussions regarding this, the thread will be locked. We hope you will find the above resources useful. Please feel free to to ask about other aspects of caring for your bunny!
Okay, so bunny one was supposed to be a girl, you thought it was a boy, and then the vet determined it was a girl. How did the vet determine this? You said the vet went to neuter him, but didn’t say exactly how it was determined he was a she. Was it because there appeared to be no testicles? How old was the bunny at the time? Sometimes their testicles do not descend. I had that with Wooly (but it was one, not both).
As for the other bunny, I would treat this like a pregnancy. Especially if you are seeing discharge. She is nesting, which is supposed to happen right (day or two) before the babies are born. I would make sure she has a nice quiet place for her nest so she isn’t stressed. She may not want to give birth until she feels safe. If no babies come and she is acting normally, then it was likely a false pregnancy.
I would definitely recommend checking out a forum like Rabbitsonline.net since they have an entire section dedicated to the care of breeding and babies.