justinh, have you double checked your "preferences" to make sure they didn't change?
You can get to your preferences from the drop down menu of your name.
Image may be NSFW.
Clik here to view.
From here you can see if your notifications to inbox/email are turned on:
Image may be NSFW.
Clik here to view.
Let me know if this doesn't resolve the issue and I can work with you offline to troubleshoot.
Thanks,
Rach (aka MRS.aLTeReGo)