Help Unlinking my email (All my contacts have been added to my moms phone)

[Gamingchallenges]

My 4G wasn't working on my iPhone the other day so I couldn't play Pokemon, my mom said I could use her phone and I did, I downloaded Pokemon and then when I opened it I put in MY email address. And now all my contacts have added to her phone as well as all my snap chat friends. It's even changed the names of some people if we both had them added already, such as I had my nan called 'nan' on my phone, and she obviously she had her under 'Mom', but now for her she's called nan as well as alot of other contacts changing.

Is there a way to fix this, I literally just put my email into Pokemon and that's it. It would be better if I could fix it without the need of her phone.

Thanks you!