Iphone 4 deleting all my notes and gmail inbox?

I'm having a huge problem, all my scholarship info on notes has been deleted, password info, and absolutely All my gmail inbox is empty when i never deleted anything or changed any settings. It started happening a few days after I got my Iphone 4 and transferred my notes into my gmail, which I don't understand and then started moving some of my email into Trash, and deleting the rest. Please someone list me some solutions to this problem, and tell me EVERYTHING and anything I can do to solve this problem. It would be very much appreciated.

Log into your Gmail email account. Check the trashbin folder.usually when we delete stuff, it is not immediately lost, but just transferred into a dedicated folder. That folder usually empty itself by your request or when you are not checking those files for a long period of time.

At any rate, you should contact Google help centre, they may have the definitive answers for ya.