I have had my iphone for a year now and I majorly effed up. I normally have 50 contacts in my phone. But I took my phone into work and accidentally synced it with my work computers. Now I have an iPhone contact list full of 450+ emails of every person I've emailed for the last 5 years through Outlook. If I sync with my home computer again, will EVERYTHING be lost? Including the numbers I manually entered? I do not have Outlook at home.
It shouldn't be a problem if you just do itunes, but don't try syncing anything that has to do with contacts again.