Don’t be scared @pinkprincess116 it is your entitlement to be paid for the work you have done. Didn’t you say you were going to get paid today? If you don’t then you need to ask him why not. If necessart ring ACAS, but hopefully, you won’t have to.
Maybe start looking for another job? You need security.
You should never be scared to ask for wages you are due.
However it is rare to be paid at weekend? Most pay dates that fall at weekend would usually be paid the last working day beforehand ie. Friday.
Simply ask when is my payday? And then advise you haven’t received yours.
Is it a large organisation? As it’s really not acceptable to not pay staff.