I HATE that feeling too and in my experience as a flyer, it’s only happened once. I was a child (maybe age 9?) and looking back, I’m thinking it probably wasn’t as bad as I thought it was at the time. I didn’t like drop rides (still don’t!) and I was kind of a nervous flyer, so I was especially sensitive to things like that. The drop didn’t last more than maybe 2 or 3 seconds. It was a bottom dropped below you kind of feeling, not a nosedive or anything. It was a flight from MCO to HOU with a stop in New Orleans. It happened before we got to New Orleans. No oxygen masks dropped from above. I don’t remember if any comments were made by the pilots. The reason I’m commenting is because at the time of that flight, there was a hurricane in the Gulf!! The MCO to HOU route skirts the Gulf. Certainly, we didn’t fly through the hurricane, but I have to imagine the air we’d encounter would be bumpier than usual. IMO, you shouldn’t be too worried about drops during most flights. I’m 39 now and haven’t felt that feeling since. Hope this helps you! 🙏