Morning sickness can definitely come and go like that during first trimester, so it's not unusual for it to flare up again even if you've had a calmer stretch, but since it's suddenly gotten worse it might be good to give your PD a call just to check everything's on track, especially to make sure you're staying hydrated. Most mums I know go through these waves of nausea at different points in pregnancy, but your doctor will want to know what's going on to rule out anything else.
unfortunately, this really varies from pregnancy to pregnancy 🙏💕