iphone 5 finds wifi network but cant connect after putting in password

hi, i have tried all day to get my iphone to connect to my wifi by resetting network settings, entering wifi password again and turning off router etc. after typing in password the wifi tab in settings says that i am connected to this wifi but in the tab at the top of my phone where it says your network/service carrier and battery percentage, the 3 bars that tell how strong my connection is does not appear at all