Horrible morning sickness to moderate morning sickness

From 6+1 to 6+4 I was miserable. I could not eat or sleep and was vomiting constantly. From 6+5 to 7 weeks (today) the sickness has been bearable. I feel nauseous but can eat and am not on the verge of puking. I have more energy.

Is it okay that my sickness went from nothing to drastic to moderate so suddenly? Did I just get used to it or could something be wrong?