22wks and was told I’m tiny 😐

My yoga instructor today asked twice how far along I was and then said I was really tiny for almost 22 weeks. It really bothers me when people act like I’m supposed to be bigger. I’m 5’9” and thin build so I always assumed baby boy is just tucked in my long torso. At my anatomy scan he was measuring great and was 10oz. I also gained 10ish lbs as of 18.5 weeks. I feel him kick all day every day so I know everything is just fine. Anyone else have this issue of looking “small” at this point?! I keep waiting to pop haha