It does sound like it has got an eye infection, which I'm sure will be easily sorted on Monday with some antibiotic eye drops. In the meantime, I would just keep her eyes as clean as possible, maybe bathe them morning and night. I always keep in my bunny first aid kit, the little plastic containers of saline, that you just snap the top of, as I prefer to then use one on each eye, by flushing it out with saline as oppose to wiping it with cotton wool. I do keep in a tube of Golden Eye Ointment as well, as if a poorly eye flares up at the weekend say, then my vet has advised me that this is ok to use until you can see a vet, as will at least offer some pain relief, and if it is just a very mild infection, will actually clear it up. You can buy it from Boots, but you can't tell them you are going to use it on a animal as they will refuse to sell it to you then, something to do with licensing laws, and them not being licensed for Animal drugs. If you do ever do this, it is important to then discard the tube though once you have stopped using it. It's not a good idea to keep half a tube to then use again, because it may well be contaminated, so I always throw out and then replace straight away.
If your vet is good with bunnies he should flush the tear ducts out, when he sees your bun, as if they don't do this, some infection is likely to remain in the tear ducts and it will take forever to clear up.. My vet will always take the bun out to a nurse to help him flush the ducts out, flush the eyes out and then start treatment, but to clear it up fully and quickly, you need a clean slate so to speak with which to start.