You don't have to open your emails.

Try not to beat yourself up, you know you need to try and motivate yourself but the way to do it is gently, gently. Now that you have missed today's classes, see if you can get up and make yourself a coffee or have a shower, and then praise yourself for doing so. Small steps are much better than trying to run. Try and help yourself by doing small things, you've already done that by writing what is going on here.

Hugs