Hi @dg6,
Welcome to the forum page and thanks for posting this on here.
Sorry to hear that you're having issues with your emails that is very strange, but we can certainly help with this.
This actually did happen to me a while back, but I was somehow able to recover them, so let's hope I can do the same for you.
Just to double check, have you tried logging into your mail on an actual laptop or another device rather than a phone just to check if it's there?
Have you also logged out, reset your password then logged back in again?
I know this sounds obvious, but have you checked your trash and spam, as depending on the device you are using, I found that some of my mail was actually in my trash, which I then moved back into my sent folder.
Please do let me know.
Thanks