Morning sickness stopped suddenly

Hi. I am in the seventh week of pregnancy. I am using progesterone suppository vaginally as my doctor prescribed. My morning sickness started around 6 weeks 2 days and has eased in just one week. Now i dont have any morning sickness at all. Should i be concerned about this. Is this a sign of miscarriage? Had anyone had morning sickness ease in just one week but had a healthy pregnancy?