Help!

Im three days late, she always comes early.. But never late. I've been extremely nauseous on and off the past week, and I get car sick every time I'm not driving. (TMI) but I've been really constipated too.. I haven't put much thought into being pregnant until this morning when my step daughter was sitting on my lap and leaned back on my boobs and I almost cried out in pain. They only hurt when you touch them though. Could these be signs? I don't want to test because I feel it's too early, and I honestly don't want to see that fbn and be disappointed. I haven't been hungrey at all lately, and thought that's why I've been dizzy and nauseous, but my boobs have never hurt like that, they get tender before I start. But I've never experienced that pain. Thoughts??