My iPhone 5S has stopped working with my wifi at home?

i do a lot of online gaming on my ps3. So I turn my wifi off on my phone so my game doesn't lag so much. A few days ago I went to go and turn it back on

but it wasn't turning on, I tried re-entering the password for the wifi but it kept saying "incorrect password". I noticed that this wifi issue is only

at home, if anyone has anything that could help it Would be greatly appreciated. Thank you !

P.S I'm not typing the wrong password for my internet.