No morning sickness at all?

I have had transvaginal ultrasound last week and my baby already had a heartbeat at 7 weeks. But I don't experience any morning sickness at all. I'm just always hungry, suffers from backache, mood swings, and leg cramps sometimes. But those were not so severe. I sometimes forget that I'm pregnant. Nagwo-worry tuloy ako kung okay lang ba si baby. Parang gusto ko ulit magpa-ultrasound. ? Meron po ba sa inyong hindi rin naka-experience na morning sickness?