Wordpress wp-admin redirects to https

I have this problem, when I try to login in my wp dashboard (wp-admin) it redirects to a https connection.

when i type websitename.com/wp-admin, it'll show the login page but the url has is different. it says, websitename.com/login.php?redirect_to=https://websitename.com&reauth=1.

I never did anything odd, i was just editing the plugin and later on this thing happens.