I sniffed mouse urine on a cloth bag. can i get sick?

Not to worry: A single whiff of rodent urine will not likely be a problem. Think of all the occupational exposure exterminators go through. [Maybe you should get one]. There are rodent urine based illnesses, mostly in odd parts of the world, however. See: https://www.cdc.gov/rodents/diseases/direct.html Rodent feces can be more toxic, (esp. hantavirus). Some may get allergic reactions.