Are you using Safari or Google Chrome (or some other browser), you said you cleared Google history but not anything else? Close down all running apps (double click home button then swipe up all apps), perform a hard reboot by holding power and home buttons until the Apple logo appears (nothing will be lost). Once it's back go into settings and navigate to Safari and scroll down to Clear History & Website data and agree to the 'clear' option. Then try firing up Safari again (if that's what you were using), this will mean that Safari will have forgotten all your website logons so you'll need to log in manually for the first time to each site you use which requires a logon.