Every pregnancy is different but if your OB did say there is anything wrong you should be fine.
I have not had any symptoms this pregnancy really at all either. You are fine little mama. Sometimes you don't feel nausea and all the rest. Enjoy it! They would have told you at the scan if anything was wrong, so don't worry!
Congratulations!!! Enjoy the freedom of being able to eat your favorite foods without throwing them back up! Enjoy the pleasure of no chronic headaches or discomfort while laying down. Enjoy smelling certain things and not feeling like you wanna throw up or actually do!! I was the same exact way. I was 13 weeks and didn't have any symptoms! I'd sometimes forget I was even pregnant, then everything kicked in. I'm currently 17 weeks and 3 days and it is HELL!!