I am 6 weeks pregnant and already had a USG. Acc to doctor my baby is normal. But I have no pregnancy symptoms. I am constantly worrying about my baby. Is it OK or not?

Yes it is normal. Especially at 6 weeks, not having any symptoms is perfectly normal. Each pregnancy is different, as is each person's pregnancy. With mine, I had NO symptoms until the third trimester. Even then it was just weird/random stuff like Restless Leg Syndrome and heartburn. I never got morning sickness or even food cravings or anything like that. Baby girl is now 4 months old and perfectly healthy! :) VERY few people have symptoms at 6 weeks and as for feeling the baby kick or things like that, right now she/he is the size of a bean so you won't feel that for a while. Congrats and GL. :)

Yes, often the first two months, there is no "signs"