I am no expert but I understand the feeling of paranoia when something seems off about your rabbit. My hunch turned out to be right when our rabbit got GI bloat, and it ended up saving him. So it's understandable to take any changes very seriously.
I cannot give medical advice, but something I've found helpful to ease anxiety is that usually a vet's office will be able to give you advice even if you don't make an appointment.
I am assuming you have an exotic vet that you'll be taking your bunny to. (If not, it would be wise to find one. Preferably one that specializes in rabbits or at least works with rabbits a lot.)
If your vet is still open, try to give them a call and tell them what is going on. They may be able to tell you whether you need to bring your rabbit in so they can evaluate them, or give you advice without having to come in. Or just say "I think your rabbit is fine, that behavior is normal."
Our vet has sometimes even been able to prescribe or suggest medication just over the phone, though this was for a rabbit who had been seen in their office before, and was during the height of the pandemic, so it might depend on the vet and the situation.
I understand that not every vet is going to be like ours. But in the past, the exotic vets that we have worked with have all been very good about this. They did not suggest to bring our rabbits in if they did not think it was needed, and if they were not sure, they would give us options. "You can try this home remedy and see if he feels better, but if not you may want to bring him in. Or you can just make an appointment if you want to be safe." That sort of thing. This really helped when we were having a lot of financial troubles last year.
Unfortunately some vets may just be out for money and may just demand that you bring your rabbit in every time you ask for advice. If you suspect this is the case, it is up to you whether you want to be safe and bring them in anyway, or maybe call a different vet (if possible) to ask for their opinion. I've really never had trouble with this before though, usually they're very good about explaining what might be wrong and being real about what your options are.
In the case that the vet is not open and you really think something is very wrong with your rabbit, call the nearest 24 hour emergency exotic vet. If you can't find one, call the nearest 24 hour emergency (regular) vet and ask if they know of the closest exotic one to you. For us it was two and a half hours away, but they were still able to give us the number for that vet.
If you are able to get ahold of one, you can tell them what's going on, and they will let you know if your rabbit needs to be seen right away. Doing this saved my rabbit's life when we weren't sure what was wrong with him, the emergency vet suspected it was bloat and was correct.
There is a chance you do not have this option where you live, in this case I believe there are 24 hour vet hotlines but I have never used one so I have no idea how helpful they are. If anyone else has used them, I would definitely be interested in knowing how it went.
I don't want to panic you, your rabbit may be just fine, but it is probably best to ask a vet if you're really not sure. I just want to give you options to help ease some of your anxiety because I know what it's like to feel paranoid about your rabbit's health.
