21 weeks is common for some pregnant woman for their belly to be small .. its fine , once you turn 28weeks / 32weeks your belly is going to be noticeable
I am 5 months as well and many commented that my bump is small. But I’m not bothered at all. Big or small as long baby is healthy!
I am 21 weeks. my doctor mention my baby is quite deep. so is okay if my bump isnt big. baby size is normal. dont worry
im 9 week 3day my bump size is like already 5 to 6mths but this is my 3rd baby lol
Don’t worry too much. It’s fine so long your baby is growing well inside your tummy 😉