I was exactly the same, don't worry the stress isn't good for you! I know exactly how you feel...I'm 12 weeks tomorrow and the only symptom I have had is sore boobs! :)
Every pregnancy is different. You are lucky that you don't feel awful. At 8 weeks I felt terrible and to this day I am almost 23 weeks and still feel terrible but my best friend is 10 weeks and she feels better than normal. Don't fret and stress yourself out.
No need to worry. Wait to your see your doctor so they can assure you that everything is ok. Not every pregnancy is the same. Some people have crazy symptoms and other don't have any till a certain amount of weeks. Just stay calm till yiy can hear from a professional (: