No AF, no pregnancy symptoms.

So I am 4 days late on my period now. I kept getting cramps on the first two days that I was supposed to get AF, so I thought it was going to come soon, and nothing. I haven't took any test, because I feel that it's going to be a false alarm, and I will get my hopes up for nothing. Besides that, I haven't got any symptoms. I know some women are different, and dont get symptoms, or get them later. . .But I dont know, I am just afraid that I will be let down.