If there are no signs of discharge(wet around the nose, matted fur on the inside of the front legs, noisy breathing, mouth breathing) and you haven't confirmed yet if the sneezing is consistent and ongoing, you might be jumping the gun a little here. Rabbits do sneeze, and can even have small sneezing fits if they get dust or debris up their nose. It could be dusty or drafty on the other side where you moved her, if she was showing no sign of a problem before moving her.
If she is still having bouts with sneezing, you could try moving her back and see if the sneezing stops. Or carefully check around her new area to see if there might be a problem causing the sneezing. I really would strongly urge not to be giving her medications unnecessarily, without ruling out other environmental possibilities first, and before confirming there is actually a health issue causing the sneezing. It's also best to only give meds under an experienced rabbit vets instruction.
Rabbits will sometimes sigh(breath out) when they flop and relax, if that is what you are seeing.