Everyone is different and every pregnancy is different that is what I have been told. What is normal for you might not be normal for someone else.
Right around 4wks before I even peed on a test I was tired, felt sick to my stomach and didn't want to eat much.
When I peed on a stick at 4 wks 6 days pregnant I started to feel a little more had to pee more often.
By 6wks I was throwing up at any time of the day but usually in the morning when I brushed my teeth. Thats when the heartburn really started, the bloating and constipation and I noticed I peed a lot more my bbs were sore.
By 8wks I was throwing up all day and had to go to the ER to get zofran and fluids.
I am 12 wks and now on 8mgs of zofran and wearing seabands to deal with the morning sickness. Now I pee a little when I sneeze. Been doing kegels hoping that it will help that go away.
If you aren't really experiencing any don't worry it might be normal for you to have the lack of smyptoms or you might start feeling them shortly. The ER doctor told me its around 8wks when most of them really start. I've read books that say 6wks. Remember each pregnancy is different.
Good luck and welcome to the board.