Sharing Itunes but not contacts

I recently upgraded to an Iphone. My wife already had one. When setting up my phone I signed into our itunes account in order to get all of the music and other things we already had. The problem is with our contacts. Once I set up my phone, I got all of her contacts and she got all of mine. Is there anyway to fix this where we can keep our own contacts but not share all of them? Also, sometimes she gets texts sent to me on her phone. I think there is something in the settings that could fix these issues but don't know what that might be.

I tried to turn off icloud-contacts in my settings but that turned all of my contacts back to phone numbers with no names attached. I'm new to iphone and quickly looked but can't find an answer to this in the forums.

Any help would be great.

Thanks,

Matt