possible virus in email link

So I clicked on a link to a persons email and when my GS3 asked what email I wanted to respond with I clicked my gmail acct then hit the always tab. As soon as I pressed always my phone went black and automatically reset itself. To make sure I wasn’t imagining things I did it again and the same result happened. I think I got a virus. My phone has been acting different its slower it doesn’t load apps sometimes it completely lost my yahoo acct and link and won’t let me restore it at all. I completely deleted my gmail acct and ran multiple anti virus campaigns on my phone all have found nothing. I also keep receiving the please wait while application is being prepared box at times now. Any know anything of this nature. It also wasn’t letting me download apps. untill I reset it.