Consider yourself blessed not to be sick this time around. You probably had all of those symptoms the first time because your body was basically "freaking out" at performing its new job. Now, with your second, your body knows what it is to be doing and can adjust a bit better...though pregnancies are different each and every time.
I had pre-eclampsia and 6 months of bedrest with my first then came the severe PPD..that was a scary time. With my second, I had the gestational diabetes and the pregnancy itch. I would never wish for that itch on anyone it was awful!! Thankfully, the itch thing is very rare and most women never experience it.
Quit worrying about not being sick etc. Praise God that you are not especially with a 3 yr old to take care of. HE will watch over you and take care of you.
Congratulations on your new blessing to come!!
J. S.