I felt mine at that early stage to and got so excited didn't feel it again till about week 20 and now I'm at week 27 and the movements are strong and never stop
I was around the same when I felt my little man moving :) now i'm 27 weeks and he moves non stop it seems lol
Felt mine at 16 weeks as well. First baby and thin. They will continue to be noticeable the next two weeks, and likely last all day (or so it seems), once you reach 20 weeks it'll decrease as baby will be asleep for all but 6 hours a day (on and off).
I felt my baby around the same time but only if i layed on my back really still and pushed on my stomach so yeah i dont think ur losing ur mind lol im 27 weeks now and he moves like crazy but i love it!
I felt my little girl move from 14 weeks :) midwife confirmed it :)