Shannon, here is one of the links from Glenda Heywood on worming. It goes in to very nice detail on what to use etc. You may want to pm her if you have any questions, she is very good.
https://www.backyardchickens.com/forum/viewtopic.php?pid=2277535
Shannon, I would try to keep her a little cooler if you can so she doesn't get more stressed out. If you can give her a fan that would be good. Also you can dampen some ground for a hole for her to lay in if she would do that. Frozen bottle waters to lay next to, shallow pans of water for them...