Baby's Movements Changing [ON]

Hi everyone, I'm a FTM currently 35 weeks pregnant. I noticed a couple days ago that baby's movements aren't as strong as they used to be. For context, he used to have a couple of hours in the day where he is moving non stop and you can see my belly visibly moving so much. Then one day, the crazy movements stopped. He's still moving and passes the kick count but they're not as strong or dramatic as before.

I ended up going calling triage and going to the hospital the day I noticed this happening. I had a pleasant experience there and they took my concerns seriously. Never made me feel silly for going. They hooked me up for half an hour. Baby's heart rate was good and there were movements. They didn't seem concerned. The resident brought in a bedside ultrasound and saw that his position changed. It is no longer head down. However, she didn't seem very confident using the ultrasound which wasn't very reassuring.

It's been 2 days since my hospital visit and movements are still not back to what they were. I am trying to remain positive and say it's his position changing or he is just running out of space. Did this happen to anyone before and baby was fine? Or should I be calling back for more monitoring?