Pregnant?

My period is five days late, but that's the only symptom I'm really having except sometimes I do feel a little nauseous. But I don't have tender breast which usually happens right before I start my period but do some women not get tender breast? Or maybe it's too early? Idk, what do you guys think? I'm thinking about waiting til Monday and if I don't have my period by then, then I'll go buy a test.