This is my fourth pregnancy no morning sickness is it normal

Yessenia • Family of 👩👨👦👧👦🤰....
So this is my fourth pregnancy I haven't had any morning sickness at all my boos are super huge then the other three pregnancies... i've been burping heartburns and that I haven't had with the other pregnancy..And also been farting in this pregnancy i hardly fart... went to the doctor to do an ultrasound at 4 weeks but thier was nothing to see,but he said my uterus was pregnant ...That meant I was pregnant and I'm scheduled to go in this Monday....Has this happened to someone 😞