Bad or lucky?

Is it a bad thing to not have many pregnancy symptoms or is that just luck? I'm 5 weeks and so far I've had really sore breasts but that's going away and every once in awhile I'll get nauseous, but no throwing up. And I get hot flashes. But I'm not having anything major. I feel like something's wrong. I saw someone post that they were worried their breasts weren't sore anymore and I was thinking how happy I am that mine aren't as bad anymore but now I'm worried.