I am having a few symptoms that make me think I may be pregnant. But I thought nausea and sore breasts were key symptoms, and earliest symptoms, and I'm not having them.

So I guess my question is, is it nessicary to have these symptoms to "confirm"? Does that make sense? Are my other symptoms (heart burn, heightened sent, spotting, ovarian and pelvic floor pain, nausea only very briefly, fatigue, fuller breasts, and hubby suggests darker areolas) invalid without more severe nausea and sore brests??