Second trimester morning sickness

Hi all! I just reached the halfway point of 20 weeks and am overall feeling pretty good. I’ve had it pretty easy, barely any sickness and a little fatigue but I’m pretty good about getting enough sleep and still powering through my days.

However, within the last week I have been feeling more nauseous. Is this normal or something I should be worried about? Someone told me morning sickness can come on at any point or trimester of pregnancy.

Also I recently just got a new bottle of Prenatals and they are a different brand than what I had before, maybe that’s attributing to feeling queasy?