Using so many "web based apps" can build up a lot of "junk" in your browser cache (memory) and start to cause weirdness on websites, logging in to Google Drive etc...
It is a good idea to periodically clean out the browsing data on your Chromebook, and is a good first step to fixing and immediate problems.
Here are the steps:
In your Chrome Browser,
Click the three little dots in the Upper Right Corner
Select More Tools
Select Clear Browsing Data
Choose Clear Data