3 days late? Creamy CM?

Im 3 days late for my AF. I was due on Thursday 20/4 and I still haven't came on my AF. I am getting a medium amount of CM. More than I usually get actually and it is creamy and sticky (not stringy) it isn't clotty or bitty and hasn't got lumps in it or anything , my CM is smooth. Could I be pregnant? Can't take a test until Tuesday 25/4