Hello Oreo - I am a rabbit novice, so hopefully some of the forum regulars will lend their advice as well.
Personally, I would take her to the vet for a checkup. My impression is that they can get respiratory illnesses fairly easily - ours did - and can deteriorate quickly. Not to alarm you, just sharing our limited (but recent) experience. Our little guy had a couple of "sneezing attacks" - multiple rapid-fire sneezes in a row. Turns out, that was the indication of the upper respiratory infection.
If you are concerned about the cost of a vet visit, you can probably call ahead to several places, describe your problem and need, and ask for a quote to be seen.
Good luck!