It this weird to you as it is me?

So I've been looking ahead in the weeks and stuff. Tomorrow I'll be 3w exact, I know it's so early right? I jumped ahead to 4w and the symptoms that are supposed to happen then (like pms type symptoms, especially tender breasts) are already happening. Should I be concerned? Fatigue is a big one too, I'm irratable and mood swings are everywhere. Is this normal or am I stressing too much?