Being logged out of apps and unrecognized passwords after macOS High Sierra update...

Ever since I updated my 2012 MacBook Pro to OS High Sierra, every time I either restart my computer or change the internet connection, my icloud, facebook, and google apps keep disconnecting. I have tried restarting and even then none of them recognize my passwords. It is affecting my emails, calendar, messages, safari, firefox and is only on my MacBook, both my iPhone and iPad are fine. I had everything working and then I had shut down my computer for a day and when I started back up, after about 15 mins, everything disconnected again.