When did your baby “drop”??

I’m in the middle of 31 weeks and my bump has changed a lot visually in the last two days… normally I can feel him sitting pretty high by pressing lightly on my stomach. Now, he is definitely lower and movement is starting to slow slightly (still counting kicks and moving a decent amount, just a little less than normal I feel). It’s still very early so I’m not sure if this is just normal third trimester stuff??