Anyone not have symptoms??

Sarah
I found out last week that I'm pregnant, but the only symptom I've had is back cramps.  I don't have sore/tender breasts that everyone seems to get.  Am I normal?  Has anyone else been pregnant and not have certain symptoms?  I'm currently 5 weeks and don't see the doctor for another 2 weeks.  Maybe I'm just being paranoid about every little thing?