My Session is frozen on level 5 lesson 1..what gives
I recommend submitting a bug report here: http://support.duolingo.com/hc/en-us/requests/new
Next, check to see if your app needs to be updated.
Additionally, if you have access, try using a different platform until the other one stops freezing up Duolingo has apps for Android, iPhone, and iPod, as well as the desktop website https://www.duolingo.com. Duolingo desktop is optimized for use with the latest version of Chrome browser. If it's freezing with Chrome, try switching to Firefox for a short while just in case that might help. Make sure that wherever you are using Duolingo, you have a steady internet connection. If your internet is cutting out, that can cause freezes too.
If you are concerned about preserving your streak, I recommend getting a Streak Freeze from the Lingot Shop. It needs to be equipped before a streak is lost. And, once it restores a lost streak, the Streak Freeze will need to be replaced if you want to use another one.
Edit: Sorry about the wrong name up top. I'd just come here from helping another person, named Judith, with the issue of their lesson freezing too.