Backtrack deleted history?

Don't get me wrong, but don't you hate it when someone plays around with your device and then they change something on it?

My friend took my iPod touch 4 and started messing around. I knew she was on google. I later fell asleep and when I woke up, I decided to check on it. I opened up the Google app and I saw my WHOLE search history was deleted. It questions me why she deleted the whole history. I hate deleting my history, I like going back and re-reading. I got kinda annoyed, really. My searches were mostly about Algebra: helping me with my homework. I know I can re search, but I'm the type of person that likes everything the way I want it and LEAVE it like that. She deleted my whole history ( well hey, if she's gonna do something bad at least don't make it obvious and just delete the particular search) and I asked why and she said "I..don't know. Like.. Cause.. I can't really explain".

Point is, is there a way to backtrack the deleted history of the google search app? A simple way, unlike "ask the wifi router company for the searches for this month". I don't want anything bad done on my ipod.

Another question, if you put a lock on your ipod, on your first attempt and you fail, will it it immediately say "ipod invalid try again in __ minutes"?

I had to put a lock on it and I came into the room and I accidentally hit the wrong key and it said "Ipod invalid try again in 5 minutes". It was my frist attempt. And she said "OOOOhh..." I asked "did you try to unlock it?" She replied "NO, I swear I didn't". Other times I failed twice and on the third try I got it right, but why did it say try again when it was my first attempt?

Sorry for the long stories lol. :P

-C