Whats done is done really. But what you can do is raise your humidity in your enclosure and do soaks twice a day in lukewarm water. Spray his/her shell directly and constantly with a squirt bottle throughout the day with warm water.
No problem, here is a link to the library that will definitely help you out even more. It was made by a member on this forum. https://sites.google.com/site/tortoiselibrary/ This is your tort bible now lol