Today I just noticed that a folder I called Pictures that I had in my Onedrive (that had sub-folders with all my photos in it) now just contains one folder which is called Camera Roll and is a sync from the Onedrive app that I have on my iphone.
I have never had an iphone before and only had this for a couple of weeks so I don't know if I have done something playing around with the app/phone a few times. I certainly don't remember deleting the folder accidentally and if I did it should be in my recycle bin which it is NOT, and if I had deleted it don't remember cleaning out my recycle bin!
Have I stuffed something up fatally and lost all my photos from over the years? Is there anyway they can be recovered or Microsoft can recover for me?
Any suggestions would be very welcome, its pretty depressing.

Tks