Hi Shantel, so sorry you are having this worry
Firstly, may I ask when your bunny was last vaccinated for Myxo?
Even bunnies vaccinated twice yearly can get nodular Myxo, where nodules appear around head, face, and bottom..plus sometimes respiratory symptoms and nasal discharge.
If you bunny is not unwell as such, then just keep her comfortable and monitor until you can take her to the vets.
It is not an absolute medical emergency if your bunny is eating, and toileting okay, but she will need to be put on Baytril for about six weeks if it is Myxo (nodular or full blown Myxo). The earlier the Baytril is started the better the long term outlook.
The biggest risk is lung infection and then damage , so firstly get your vet to confirm what it is, then if Myxo, cover with Baytril before any lung problems develop.
Although isolating your bunny is good in one way, when we had an outbreak in our bunnies here (who were all vaccinated so did not get full blown Myxo) we kept groups together, as they are usually all exposed at the same time, so you have to weigh up stress to bunny of isolating him/ her from the group, and protecting the other bunnies.
You have to do what you personally feel is best for your own rabbit(s)
If rest of bunnies are vaccinated up to date (ie within past six months) then we would leave them together (unless the bunny with Myxo has nasal discharge and then we would isolate)..if bunnies are not vaccinated, you need to put the bunny with Myxo in a covered hutch, ie with a net curtain over to stop flying insects going in, and carrying Myxo to the rest.
De Flea the entire area every day for a week to try and prevent tranmission that way too.
Hope your poor bunny will be alright, keeping everything crossed it is not Myxo, but if it is, vaccinated bunnies usually survive it, but need careful husbandry for many weeks.
Thinking of you Shantel.
Love Adele and all the bunnies
XX