This is a house rabbit forum and we don’t discuss intentional breeding so most of us are unable to help you in that regard-we’re not experts in what’s normal for a pregnant rabbit. That said I think if you are concerned (about any rabbit) it’s best to see a vet.

I’m not sure from your post if this is an intentional or accidental pregnancy but just for your reference I’m going to post the excerpt from our rules about posting about pregnancies. https://binkybunny.com/FORUM/tabid/54/aft/10084/afnp/310990/Default.aspx

Discussions of Breeding and Rabbits as Livestock: Discussions involving intentional breeding (of any animal) and meat & fur rabbits are not allowed.
• 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!

Do not post pictures of the litters unless you plan on keeping them.(or whichever one or so you plan to keep). Please refer to D-1 for rules about photos.

• Exceptions: Certified Rescues can post about a litters in regards to adoption and rescue support Rescues many times are subject to getting rabbits in that are already pregnant. They are allowed to use our forum to post about it in the RESCUE SECTION and use the forum as a resource for adoption.
***D-1 Baby bunny photos are allowed under these circumstances:
1. This is your own baby bunny that are already have or are planning to buy/adopt/acquire. Avoid posting photos of babies under 8 weeks of age.
2. Accidental Litters – You may only post pictures of the rabbit that you are certain you will keep. Bunny must be at least 8 weeks of age in photos, and the image cannot contain any other rabbits that you are not keeping.
While we understand that accidental litters do happen, these photo threads can distract from our main focus of helping members care for their bunnies. Therefore, we ask that if you want to show off the bunny you intend to keep, that you contain your photos and updates to a single thread in the Lounge. This enables us stay focused on what is most important to our forum and meet the needs of our members.
3. You are foster, volunteer, or work for a certified rescue/shelter. Post in the Rescue Section only and provide the shelter name & link to the shelter in your first post. Keep updates to a single thread.

She sounds stressed, which may or may not be normal. I imagine being close to giving birth would be stressful for a bunny, not to mention uncomfortable. Just how much of what your witnessing is actually due to the pregnancy, I don’t know. As KK said, we are not experienced here with such things since we are a house rabbit forum that advocates spaying/neutering. I would monitor her closely and watch for signs of nesting and seek advice from a vet if you feel something isn’t right.