It all depends on your frame, your orginial weight, if this is your first child, how in shape you were when you got pregnant, etc. if this is your first child, you usually show later in the pregnancy bc by the second and third times your body knows what to do and starts reacting sooner. if you are underweight you will show sooner only bc there arent many places for the baby to go except out
if you are overweight, you may show later. if you are shorter, you will show sooner bc like being underweight there aren't many places for the baby to go. if you are taller, you'll show later. if you were super in shape, you'll show later only because your stomach muscles were tighter. if you were (like me) out of shape, you'll show sooner because your stomach muscles are weaker.
all that being said
i am 5'3, was about 115 before i got pregnant. (not overweight or underweight) but i was out of shape. almost right way i started "showing". my doctor said it was bloat. some days i was bigger than other days. also, in the morning i was smaller and by the end of the day i was much bigger.
i am 18.5 weeks now and am definitely showing now. my bloat went away around 13-14 weeks and i started getting a prounouced pooch that turned into the baby pouch. there is no denying it now that i am pregnant. but it all depends...another girl at work was almost 6 months before she told anyone and when she did i couldnt barely tell she was pregnant. it made me think something was wrong with me but EVERYONE'S different. youre bloat will definitely go down but just in time for the baby to pop up