Hello and welcome to FF! Sorry your frog is not well and good that it's isolated from others. What water are you using? Any other frogs acting abnormally?

Have you discovered anything amiss in enclosure upon your return? Also, can you please test water for pH, Ammonia, Nitrites, and Nitrates and post findings here? Frog appears to be showing some neurological issues and that could be caused by age, or something toxic in tank. Did roommate do water changes or any maintenance other than feeding frogs? Good luck !