When do you know when baby drops?

mary

Currently 33 weeks. Been feeling a bit more pressure on pubic bone and hips. Feels like he has a mix of days of being really low in my pelvis and other days where he switches position. I dont think I’ve dropped yet but sometimes I just wonder if he’s getting ready to. Feels like my body is getting ready for Labor day by day and feeling a lot. How did you know when baby dropped? I know a lot will drop right before coming out too. So I know it doesn’t mean anything just curious as a first time mom😊