Decrease in movement

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So I know they say you don't start counting kicks until 28 weeks but I'm 25 weeks and the last three days my son hasn't been moving as much. I've felt him kick me all the time every day since 16-17 weeks. I still feel him once in a while but it's only little nudges and pokes and I used to see my belly jump from him kicking me so hard. I chalked it up to his position the first day but it seems weird for him to be in the same weird position for three days. He doesn't respond to cold drinks or poking or laying on my side. Idk if I should worry at this point. I asked my ob if it's normal for him to still have lazy days and she said yes but it's been three days now. He sounds good on Doppler so idk if he's growing or positioned weird or what but I can't help but worry. Has anyone had this happen for a few days or even a week and then baby went back to kicking like crazy? I miss his kicks. They were so reassuring.