My profile picture was fine until I clicked on a link to change my primary email address, and now it’s missing. I wouldn’t think the two are linked but I’m supposing they must be since it was fine before. Also, I’ve tried uploading my picture again, but it won’t save!
It doesn’t look like your Gravatar image disappeared, I can see it on my end when accessing https://wordpress.com/me
Have you tried to clear your browser’s cache? You can find here more information on how to clear the cache depending on your browser: