Phone Problem: Has reset

I was using my phone and suddenly it turned off. It turned itself on again and appeared with the screen that appear when you first have the phone, the welcoming. I pass the welcome page, the wifi page and then have to accept the terms and conditions, but it won't let me pass to the next page, it just refreshes. So I am stuck on accepting the terms and conditions page... I have had my phone for a month now and this has never happened! Help!!